ONEOK Partners to Participate in Morgan Stanley MLP CEO Roundtable

September 18, 2008

TULSA, Okla., Sept 18, 2008 /PRNewswire-FirstCall via COMTEX News Network/ -- ONEOK Partners, L.P. (NYSE: OKS) will participate in the Morgan Stanley Master Limited Partnership CEO Roundtable on Tuesday, Sept. 23, 2008, in Houston, Texas. John W. Gibson, chairman and chief executive officer of ONEOK Partners, will present.

A slide presentation will be available on Sept. 23 on the company's Web site, http://www.oneokpartners.com

ONEOK Partners, L.P. (NYSE: OKS) is one of the largest publicly traded limited partnerships, and is a leader in the gathering, processing, storage and transportation of natural gas in the U.S. and owns one of the nation's premier natural gas liquids (NGL) systems, connecting much of the natural gas and NGL supply in the Mid-Continent with key market centers. Our general partner is a wholly owned subsidiary of ONEOK, Inc. (NYSE: OKE), a diversified energy company, which owns 47.7 percent of the overall partnership interest. ONEOK is one of the largest natural gas distributors in the United States, and its energy services operation focuses primarily on marketing natural gas and related services throughout the U.S.

For more information, visit the Web sites at www.oneokpartners.com or www.oneok.com.

OKS-FV

                                 Analyst Contact:   Christy Williamson
                                                    918-588-7163
                                 Media Contact:     Megan Washbourne
                                                    918-588-7572

SOURCE ONEOK Partners, L.P.

http://www.oneok.com

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