Cast members Ryan Reynolds, Olivia Wilde and Jason Bateman were all on hand for the night's stars-studded promotional event.
With fellow co-stars Leslie Mann and Perrey Reeves also on-hand, a surprise appearance was made by Sandra Bullock as the Oscar-winning actress was on-hand to support her "The Proposal" co-star Reynolds.
The R-rated funny flick centers around a "married father who accidentally switches bodies with his best friend, leading to a series of wildly complex difficulties," according to IMDb.
Sure to bring a bevy of laughs, the David Dobkin directed film all set to hit theaters beginning August 5.
Enjoy the pictures of the stars of "The Change-Up" at its Los Angeles premiere (August 1).
Ryan Reynolds with Sandra Bullock