The cast of The Change-Up and one special Oscar-winning guest rocked the red carpet at The Village Theater in Hollywood for the comedy's big premiere.

Ryan Reynolds seemed thrilled to have his buddy and Proposal co-star Sandra Bullock supporting his newest flick. Sandy, 47, looks stunning in her black ensemble!

Also looking gorgeous ... Olivia Wilde and funny guy Jason Bateman. See all the celebrities who attended the event in the gallery below.

Check out the ever-shrinking Jonah Hill ... after the jump.