|   | (Date of report)                  | May 13, 2010 |
|--------|-----------------------------------|--------------|
|   | (Date of earliest event reported) | May 11, 2010 |

| 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 May 11, 2010, ONEOK, Inc. announced that Robert F. Martinovich, chief operating officer of ONEOK, Inc., will present at the American Gas Association Financial Forum on Tuesday, May 18, 2010, in Palm Beach, Fla., at 10:30 a.m. Eastern Daylight Time (9:30 a.m. Central Daylight Time). The conference will be webcast and will be accessible on ONEOK, Inc.’s Web site, www.oneok.com.  A replay of the webcast will be archived for 30 days after the conference. ONEOK, Inc. will also post the presentation materials on its Web site that morning, beginning at 9:00 a.m. Eastern Daylight Time (8:00 a.m. Central Daylight Time).  |
| Item 9.01 |   | Financial Statements and Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|      |   |  Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|      |   | 99.1   News release issued by ONEOK, Inc. dated May 11, 2010.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|      |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |

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|   |         |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C., General Partner |
|--------|--------------|--------|-------------------------------------------------------------------------------|
|   |         |   |                                                                          |
| Date:  | May 13, 2010 | By:    | /s/ Curtis L. Dinan                                                           |
|   |         |   | Executive Vice President -Chief Financial Officer andTreasurer           |