Anna Faris let a secret slip out during the Samsung Galaxy S III launch party in Beverly Hills, June 21^st.

While mingling with her What’s Your Number? costar, Dave Annable, the actress let the sex of her baby accidentally slip out.

 "He's doing great!" Faris, 35, was overheard telling pals. "We're growing everyday."

The baby boy, who is due in the fall, will be the first for Faris and husband,  Chris Pratt, who met on the set of Take Me Home Tonight and wed in Bali in July 2009.