|   | (Date of report)                  | June 1, 2011 |
|--------|-----------------------------------|--------------|
|   | (Date of earliest event reported) | June 1, 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 June 1, 2011, we announced we will participate in the Citi Power and Gas Conference on Thursday, June 2, 2011, in Boston, Mass. Robert F. Martinovich, senior vice president, chief financial officer and treasurer of ONEOK, Inc. and ONEOK Partners, GP, L.L.C., our general partner, will be conducting a series of one-on-one meetings with members of the investment community. The materials utilized at the conference will be accessible on the ONEOK and ONEOK Partners websites, www.oneok.com and www.oneokpartners.com, on Thursday, June 2, 2011, beginning at 7 a.m. Central Daylight Time. 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 June 1, 2011.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|      |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |

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|   |         |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C.,General Partner          |
|--------|--------------|--------|---------------------------------------------------------------------------------------|
|   |         |   |                                                                                  |
| Date:  | June 1, 2011 | By:    | /s/ Robert F. Martinovich                                                             |
|   |         |   | Robert F. MartinovichSenior Vice President,Chief Financial Officer andTreasurer  |