Karyn Bosnak Live Tweeting "What's Your Number?" Premiere for Us Weekly

Entertainment September 19, 2011 AT 12:05PM By UsWeekly Staff

Credit: Claire Folger

In the new rom-com What's Your Number? (in theaters Sept. 30), Anna Faris' character tracks down her former flames in hopes of finding the one that got away.

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Inspired by author Karyn Bosnak's novel 20 Times a Lady, the star-studded cast features hotties Chris Evans, Zachary Quinto, Andy Samberg, Joel McHale, Dave Annable, Chris Pratt, Aziz Ansari and Mike Vogel.

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Bosnak, 36, will be tweeting for Us Weekly live from the film's L.A. premiere beginning at 9:30 p.m. EST Monday. Be sure to follow @UsWeekly for Bosnak's funny red carpet anecdotes, exclusive pics and much more!

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