UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-K
(MARK ONE)

[X]      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF1934

For the fiscal period ended June 30, 2005

                                       OR

[ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 [NO FEE REQUIRED]

Commission file number: 333-123901


                 INTERSTAR SECURITISATION MANAGEMENT PTY LIMITED
   in its capacity as manager of the Interstar Millennium Series 2005-1G Trust
          ABN [Application has been made to the appropriate Australian
                        authority to obtain such number]
   ---------------------------------------------------------------------------
             (Exact name of Registrant as specified in its charter)


                           NEW SOUTH WALES, AUSTRALIA
                 -----------------------------------------------
                 (State or Other Jurisdiction of Incorporation)

                                       N/A
                      ------------------------------------
                      (I.R.S. Employer Identification No.)


             LEVEL 10, 101 COLLINS STREET MELBOURNE, 3000, AUSTRALIA
             -------------------------------------------------------
                    (Address of principal executive offices)


                              (0011) 613 8616 1600
               ---------------------------------------------------
              (Registrant's Telephone Number, Including Area Code)


SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:
None

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:
None.

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the last 90 days.
         Yes [X]           No []

Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [X]

Indicate  by check mark  whether  the  registrant  is an  accelerated  filer (as
defined in Rule 12b-2 of the Act). Yes[ ] No [X]

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<PAGE>


State the aggregate market value of the voting and non-voting common equity held
by  nonaffiliates  computed by reference to the price at which the common equity
was last sold, or the average bid and asked price of such common  equity,  as of
the last business day of the registrant's most recently  completed second fiscal
quarter. Not Applicable


                                       2

<PAGE>



                                TABLE OF CONTENTS

PART 1       ..................................................................5

ITEM 1.      BUSINESS..........................................................5
ITEM 2.      PROPERTIES........................................................5
ITEM 3.      LEGAL PROCEEDINGS.................................................5
ITEM 4.      SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS...............5


PART II      ..................................................................5

ITEM 5.      MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER
             MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES.................5
ITEM 6.      SELECTED FINANCIAL DATA...........................................6
ITEM 7.      MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
             AND RESULTS OF OPERATIONS.........................................6
ITEM 7A.     QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK........6
ITEM 8.      FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.......................7
ITEM 9.      CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING
             AND FINANCIAL DISCLOSURE..........................................7

PART III     ..................................................................8

ITEM 10.     DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT................8
ITEM 11.     EXECUTIVE COMPENSATION............................................8
ITEM 12.     SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND
             MANAGEMENT AND RELATED STOCKHOLDER MATTERS........................8
ITEM 13.     CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS....................8
ITEM 14.     PRINCIPAL ACCOUNTANT FEES AND SERVICES............................8


PART IV      ..................................................................9

ITEM 15.     EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS
             ON FORM 8-K.......................................................9


                                       3

<PAGE>

                                INTRODUCTORY NOTE


The information  required for some items in Form 10-K is "not applicable" to the
Trust or the Manager.  As used in this Annual  Report  filed on Form 10-K,  "not
applicable" or "Not  Applicable"  means that the response to the referenced item
is omitted in reliance on the procedures  outlined in numerous no-action letters
issued  by  the  Commission's  Staff  with  respect  to  substantially   similar
securities and trusts that file annual reports on Form 10-K.



                                       4
<PAGE>

                                     PART I

ITEM 1.  BUSINESS

This  Annual  Report on Form 10-K  relates to the  Interstar  Millennium  Series
2005-1G Trust (the "Trust") and the Class A Mortgage  Backed Floating Rate Notes
(the "Notes")  issued pursuant to the Note Trust Deed dated as of April 28, 2005
(the "Note Trust Deed"), between Perpetual Trustees Victoria Limited, the issuer
trustee (the "Issuer Trustee"), Interstar Securitisation Management Pty Ltd (the
"Manager"),  as Manager,  and The Bank of New York,  as note  trustee (the "Note
Trustee").  Capitalised  terms used in this Form 10-K and not  defined  have the
same meanings given to them in the Prospectus and Series Notice  relating to the
Notes.

The only business of the Trust is the collection and distribution of payments on
the  residential  mortgage  loans in the manner  described  in the  Registration
Statement on Form S-11 (File No.  333-123901)  (the  "Registration  Statement").
Accordingly,  there is no relevant information to report in response to Item 101
of Regulation S-K.


ITEM 2.  PROPERTIES

The  registrant  and the Trust do not own any physical  properties.  Information
regarding  the mortgage  loans is furnished  under Item 15 - Exhibit 99.1 and is
incorporated herein by reference.


ITEM 3.  LEGAL PROCEEDINGS

The Manager knows of no material legal  proceedings  involving any of the Trust,
the Manager, the Servicer or the Issuer Trustee.


ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

No votes or consents of Noteholders  were  solicited  during the fiscal year for
any purpose.


                                     PART II

ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS
         AND ISSUER PURCHASES OF EQUITY  SECURITIES

The Notes are not traded on any  nationally  recognized  exchange  in the United
States.

The Notes are currently  represented by  certificates  registered in the name of
Cede & Co., the nominee of The Depository  Trust Company  ("DTC").  Accordingly,
Cede & Co. is the sole  holder of record of the Notes,  which it holds on behalf
of brokers, dealers, banks and other direct participants in the DTC system.

The trust pays no dividends with respect to the Notes, the information  required
by Item 201(c) of Regulation  S-K  regarding  dividends is  inapplicable  to the
Trust.  See  Exhibit  99.1 for  information  with  respect to  distributions  to
Noteholders.


                                       5

<PAGE>



ITEM 6.  SELECTED FINANCIAL DATA

The Manager incorporates by reference its Noteholders Reports, filed as periodic
filings on Form 8-K, in respect of the Trust under Central Index Key  0001325633
which contain all  financial  information  related to the Trust  relevant to the
holders of the Notes (the  "Noteholders"),  pursuant to rule 12b-23  promulgated
under the Securities Exchange Act of 1934.

The Manager  globally  incorporates  by reference and attaches hereto as Exhibit
13.1,  pursuant to Rules 12b-23 promulgated under the Securities Exchange Act of
1934, the following quarterly Noteholders Report (the "Noteholders Report"), for
the  quarterly  Payment Date in June 2005 filed on on Form 8-K in respect of the
Trust  under  Central  Index  Key  0001325633,   which  includes  all  financial
information relating to the Trust that is relevant to Noteholders:

o    Noteholders Report for the June 8, 2005 Payment Date

The Manager also attaches hereto, as Exhibit 99.1 the following document:

o    Aggregate Totals for the period May 4, 2005 to the end of the Trust's
     fiscal year on June 30, 2005.

The foregoing presents all relevant financial information relating to the Trust.
Because of the limited business  activity of the Trust,  the Selected  Financial
Data in Item 301 of Regulation S-K would not provide any  meaningful  additional
information.


ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
         AND RESULTS OF OPERATIONS

Because of the limited  business  activity  of the Trust,  the  presentation  of
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations,  as otherwise would be required by Item 303 of Regulation S-K, would
not be  meaningful.  All relevant  information  is  contained  in the  quarterly
servicing reports (filed under Current Reports on Form 8-K) as described above.


ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Currency Exchange Control Risk

Interest  and  principal  payments  to  holders  of the Notes are paid in United
States dollars  ("U.S.  dollars").  However  payments on the mortgage loans (the
"Collections")  are received by the Issuer Trustee,  in Australian  dollars,  in
Australia.  Pursuant to certain swap agreements  ("Currency Swaps"),  the Issuer
Trustee  is  required  to pay a  portion  of the  Collections  to  certain  swap
counterparties  (the "Currency Swap  Providers") who in turn pay ("Swap Currency
Exchange"),  at the direction of the Issuer Trustee, U.S. dollars to the holders
of the Notes.  It is possible that in the future,  Australia may impose exchange
controls that affect the  availability of Australian  dollar payments for making
payments under the Currency  Swaps.  The holders of the Notes will bear the risk
of the imposition of foreign exchange controls by the Australian government that
impact upon the Issuer  Trustee's  ability to exchange the  Collections for U.S.
dollars.

The Issuer  Trustee  has no  control  over such risk,  which will  generally  be
affected by economic and political  events in Australia.  If the Issuer  Trustee
does  not pay  some or all of the  amount  in  Australian  dollars  which  it is
required to pay the  Currency  Swap  Providers  under the  Currency  Swaps,  the
Currency Swap Providers are only required to pay the U.S.  dollar  equivalent of
the amounts they actually receive.  In such event, it is unlikely that the Trust
would have sufficient U.S. dollars to make the payments due on the Notes.

The specific prior approval of the Reserve Bank of Australia or the Minister for
Foreign  Affairs of the  Commonwealth  of Australia must be obtained for certain
transactions  involving or connected with  individuals or entities listed in the
relevant Commonwealth  Government Gazette as persons or entities identified with
terrorism or to which financial sanctions apply, including:

o    certain Yugoslav entities or individuals; and


                                       6
<PAGE>

o    the Government of Zimbabwe,  any public  authority or controlled  entity of
     the Government of Zimbabwe and certain other individuals  identified by the
     Reserve Bank of Australia.

Any person  holding  financial or other assets of persons or entities  listed as
terrorists by the Minister for Foreign  Affairs in the  Commonwealth  Gazette is
prohibited from using or dealing with those assets.  It is a criminal offence to
make  assets  available  to such  persons.  The  persons or  entities  listed as
terrorists under the Charter of the United Nations  (Terrorism and Dealings with
Assets)  Regulations 2002 and the Iraq  (Reconstruction and Repeal of Sanctions)
Regulations 2003 include:

o    the  Taliban  (also  known as the Islamic  Emirate of  Afghanistan)  or any
     undertaking owned or controlled, directly or indirectly, by the Taliban;

o    Osama bin Laden, the Al-Qaeda  organisation  and certain other  individuals
     identified by the Reserve Bank of Australia as being linked to terrorism;

o    Jemiah Islamiah; and

o    the previous Government of Iraq, Saddam Hussein,  other senior officials of
     his regime and their immediate families.


Currency Exchange Rate Risk

Interest and  principal on the Notes are payable in U.S.  dollars and the Issuer
Trustee's  primary  source  for  funding  its  payments  on  the  Notes  is  its
Collections on the mortgage loans, which will be sourced in Australian  dollars.
If the Currency Swap  Providers were to fail to perform under the Currency Swaps
or were to be discharged from such performance  because of a default  thereunder
by the Issuer Trustee,  the Issuer Trustee might have to exchange its Australian
dollars  for U.S.  dollars at an  exchange  rate that is less  favorable  to the
Issuer  Trustee  than  when the  Currency  Swaps  were  entered  into and  might
therefore not have sufficient U.S. dollars to make timely payments on the Notes,
even though the  delinquency  and loss  experience on the mortgage  loans may be
acceptable.


ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

As discussed above,  furnishing the financial  information required by Item 8 of
Form  10-K  would  not add any  relevant  information  to that  provided  by the
foregoing   statements.   Because  the  Notes  are  essentially   "pass-through"
securities, the Trust will have "income" only in the limited sense of collecting
payments on the mortgage  loans.  The only  material  items of "expense" for the
Trust will be the amounts paid as servicing compensation, and coupon interest to
investors.  The quarterly  Noteholders  Report (filed on Form 8-K) discloses the
amount of "income" and "expenses" of the Trust.


ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING
         AND FINANCIAL DISCLOSURE

There were no disagreements on accounting disclosures.



                                       7
<PAGE>


                                    PART III

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

The Trust has no directors or executive  officers.  Therefore,  this item is not
applicable.


ITEM 11.  EXECUTIVE COMPENSATION

The Trust has no directors or executive  officers.  Therefore,  this item is not
applicable.


ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
          AND RELATED STOCKHOLDER MATTERS

All of the Noteholders  maintained their security  positions with the DTC. While
some of the  Noteholders'  security  positions in the Trust may exceed 5% of the
outstanding  amount of the Notes, such Notes do not constitute voting securities
within the meaning of Item 403 of Regulation S-K.

As at the  date of  this  report,  none  of the  officers  or  directors  of the
Registrant owns a beneficial interest in either the Trust, or in the Registrant.


ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Interstar Securitisation  Management Pty Limited is a wholly owned subsidiary of
Interstar Wholesale Finance Pty Limited.  Its principal business activity is the
management of securitisation  trusts established under the Interstar  Millennium
Trust Programmes.

Interstar Wholesale Finance Pty Limited acts as servicer (the "Servicer") to the
Trust. The servicer receives a servicer fee direct from the Trust.

The Servicer is a wholly owned direct subsidiary of Interstar  Wholesale Finance
Holdings Pty Limited  ("Interstar  Holdings").  All shares in Interstar Holdings
are  ultimately  owned  (effective  September 29, 2003) by Challenger  Financial
Services  Group  Limited,  a  public  company  listed  on the  Australian  Stock
Exchange.

The Manager has  entered  into an  arrangement  with the  Servicer,  whereby the
Servicer  provides  services  and  various  facilities  to the Trust  Manager on
commercial terms, in order for the Manager to carry out its functions as manager
under the securitization trusts. Interstar Securitisation Management Pty Limited
pays management fees to the Servicer.


ITEM 14.  PRINCIPAL ACCOUNTANT FEES AND SERVICES

Asset-Backed  Issuers are not required to disclose the  information  required by
this item.



                                       8
<PAGE>


                                     PART IV


ITEM 15.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

(a) (1) and (2):

Incorporated  herein as Exhibit 99.1 are the  aggregate  totals of the quarterly
Noteholder  Reports to the Trust for the 2 months ended June 30, 2005. A copy of
the Officer's Certificate of Compliance is attached hereto as Exhibit No. 99.3

<TABLE>
<CAPTION>
(a)(3) EXHIBITS:

------------------------- --------------------------------------------------- -----------------------
      Designation                            Description                         Method of Filing
------------------------- --------------------------------------------------- -----------------------
<S>                      <C>                                                          <C>

Exhibit 13.1              Noteholders  Report  for the June 8, 2005  Payment           13.1
                          Date
Exhibit 31.1              Section 302 Certification                                    31.1
Exhibit 99.1              Aggregate  Totals  for the  period  May 4, 2005 to           99.1
                          June 30, 2005
Exhibit 99.2              Independent  Auditor's Annual Servicer  Compliance           99.2
                          Certificate
Exhibit 99.3              Officer's Certificate of Compliance                          99.3
Exhibit 99.4              Servicer's Certificate of Compliance                         99.4
------------------------- --------------------------------------------------- -----------------------
</TABLE>


(b)  FOR THE JUNE 8,  2005  PAYMENT  DATE A REPORT  ON FORM 8-K WAS FILED BY THE
     REGISTRANT IN ORDER TO PROVIDE THE STATEMENTS  FOR QUARTERLY  DISTRIBUTIONS
     TO THE NOTEHOLDERS.

NO OTHER REPORTS ON FORM 8-K HAVE BEEN FILED DURING THE LAST TWO MONTHS  COVERED
BY THIS REPORT.

                                       9
<PAGE>


                                   SIGNATURES

Pursuant to the  requirements of Section 13 or 15(d) of the Securities  Exchange
Act of 1934,  the  registrant  has duly  caused  this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

INTERSTAR SECURITISATION MANAGEMENT PTY LIMITED



 /s/   Andrew Twyford
------------------------------
Name:  Andrew Twyford
Title: Director
Date:  September 23, 2005







                                       10
<PAGE>


                                INDEX TO EXHIBITS


EXHIBIT NO.   DOCUMENT DESCRIPTION
------------- ------------------------------------------------------------------
13.1          Noteholders Report for the June 8, 2005 Payment Date
31.1          Section 302 Certification
99.1          Aggregate Totals for the Period May 4, 2005 to June 30, 2005
99.2          Independent Auditor's Annual Servicer Compliance Certificate
99.3          Officer's Certificate of Compliance
99.4          Servicer's Certificate of Compliance







                                       11