|   | (Date of report)                  | April 8, 2011 |
|--------|-----------------------------------|---------------|
|   | (Date of earliest event reported) | April 5, 2011 |

| Delaware                     |   | 1-12202      |   | 93-1120873          |
|------------------------------|--------|--------------|--------|---------------------|
| (State or other jurisdiction |   | (Commission  |   | (IRS Employer       |
| of incorporation)            |   | File Number) |   | Identification No.) |

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| Item 7.01 |   | Regulation FD Disclosure                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|-----------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|      |   |  On April 5, 2011, ONEOK, Inc. and ONEOK Partners, L.P. announced they will release first-quarter 2011 earnings after the market closes on Tuesday, May 3, 2011, and will hold a joint conference call and live webcast at 11 a.m. Eastern Daylight Time (10 a.m. Central Daylight Time), Wednesday, May 4, 2011.  A copy of the news release is attached as Exhibit 99.1 and is incorporated herein by reference. The information disclosed in this Item 7.01, including Exhibit 99.1 hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the Exchange Act), or otherwise subject to the liabilities under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act except as expressly set forth by specific reference in such filing.  |
| Item 9.01 |   | Financial Statements and Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|      |   |  Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|      |   | 99.1    News release issued by ONEOK Inc. and ONEOK Partners, L.P. dated April 5, 2011.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |

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|   |          |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C., General Partner |
|--------|---------------|--------|-------------------------------------------------------------------------------|
|   |          |   |                                                                          |
| Date:  | April 8, 2011 | By:    | /s/ Robert F. Martinovich                                                     |
|   |          |   | Senior Vice President,Chief Financial Officer andTreasurer               |