SECURITIES AND EXCHANGE COMMISSION

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

(Date of report)

April 10, 2008

(Date of earliest event reported)

April 9, 2008

ONEOK, Inc.

(Exact name of registrant as specified in its charter)

Oklahoma

001-13643

73-1520922

(State or other jurisdiction

(Commission

(IRS Employer

of incorporation)

File Number)

Identification No.)

100 West Fifth Street; Tulsa, OK

(Address of principal executive offices)

74103

(Zip code)

(918) 588-7000

(Registrant's telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

[] Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[] Soliciting material pursuant to Rule 14a-12 under the Securities Act (17 CFR 240.14a-12)

[] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01

Regulation FD Disclosure

On April 9, 2008, we announced that ONEOK, Inc. and ONEOK Partners, L.P. will release first-quarter 2008 earnings after the market closes on Wednesday, April 30, 2008.

A joint conference call will be held the following day on Thursday, May 1, 2008, at 11:00 a.m. Eastern Daylight Time (10:00 a.m. Central Daylight Time). The conference call number is 866-847-7864, pass code 1226646. The call will also be carried live at www.oneok.com and www.oneokpartners.com. A replay of the call will be available on both web sites for 30 days. A recording will be available by phone for seven days. The playback call may be accessed at 866-837-8032, pass code 1226646.

Item 9.01

Financial Statements and Exhibits

Exhibits

99.1 News release issued by ONEOK, Inc. and ONEOK Partners, L. P. dated April 9, 2008.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

ONEOK, Inc.

Date:

April 10, 2008

By:

/s/ Curtis L. Dinan

Senior Vice President -

Chief Financial Officer and

Treasurer

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