Williams, host of "The Montel Williams Show," will guide "American Candidate" as the reality show ultimately chooses one person who's qualified to run for president of the United States.
The 10-episode series premieres Aug. 1 and is the brainchild of Oscar-nominated documentary filmmaker R.J. Cutler ("The War Room," "American High").
Among the participants is Chrissy Gephardt (search), the openly gay daughter of former Sen. Richard Gephardt.
"Montel Williams . . . has had years of experience interviewing and producing captivating stories about issues facing all types of Americans," says Showtime president Robert Greenblatt.
"This, along with his amazing life experience as a decorated naval officer, successful author and a man determined to bring an end to Multiple Sclerosis, makes him uniquely suited to host 'American Candidate.' "
The winner of "American Candidate" will snag $200,000 and a nationwide media appearance after the conclusion of the show — in order to "address" the nation.