Winokur will join Richard Belzer, Chynna Phillips, Andy Dick and Mark Steines for the July 12 broadcast of the new show, which features five celebrities playing tournament-style blackjack. "Celebrity Blackjack" is a six-part series; the final winner of all the rounds will receive $100,000 for the charity of his or her choice. "Celebrity Blackjack" is hosted by Matt Vasgersian and Alex Borstein. The hour-long program airs from 10-11 PM on GSN; check local listings.

Marissa Jaret Winokur won the 2003 Tony Award for Best Actress in a Musical for her performance as Tracy Turnblad in Hairspray. She also appeared on Broadway in the hit revival of Grease! as well as the L.A. Reprise production of Hair. Winokur portrayed Janine in the Oscar winning film “American Beauty" and has also been seen in “Teaching Mrs. Tingle,” “Never Been Kissed,” “Scary Movie,” “Dharma & Greg,” “Moesha,” “Just Shoot Me,” “Boston Public,” “The Ellen Show,” “Felicity,” “Nikki,” “Steve Harvey,” “Get Real” and “Curb: Your Enthusiasm.”

Winokur will repeat her work as Tracy for the Los Angeles run of Hairspray at the Pantages Theatre, July 20-Sept. 5.