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Julia Stiles

Benefit draws Jason Biggs, Julia Stiles and Kesha onstage

Live theater is stressful for any actor, so just imagine how crazy it can be if you've been handed a script only a few hours before having to go onstage.

That's what's facing about two dozen brave stars on Monday night at the 15th annual benefit "The 24 Hour Plays on Broadway," which asks actors, writers and directors to come up with six original short plays over the course of a day.

"The biggest lesson is to have fun and not take yourself too seriously," said Jason Biggs, the "American Pie" star. "You're going to look like a fool — that's the point."

Biggs will be joined by performers Sasha Alexander, Geoffrey Arend,...