I Love You Man starring Paul Rudd and Jason Segel.
Paul Rudd is the only bit of non-debatable talent in 40 Year Old Virgin and Knocked Up.
Jason Segel is the guy in Forgetting Sarah Marshall who exposes his penis about 5 minutes in (and probably the reason we didn’t turn it off if we’re honest!).
If that’s not enough for you it also stars 1/3 of The Lonely Island, Andy Samberg.