Hangover is a comedy about three friends who wake up after some pre-wedding festivities in Las Vegas to discover that they have misplaced the groom. (I think we've all been there.) Helms and Cooper will be two of the friends; the third has not yet been cast. Presumably the groom is a relatively minor character, given that he is missing for much of the film.
Helms (on the left) is a favorite these days from his work on The Daily Show and The Office, while Cooper, probably best known for TV's Alias and Kitchen Confidential, has slowly started adding movie comedies to his résumé. He shows up in this summer's The Rocker as a heavy-metaller whose bandmates are Will Arnett, Fred Armisen, and Rainn Wilson, which is pretty good company, comedy-wise.
It's worth noting that the Hangover, written by Jon Lucas and Scott Moore, was on the list of Hollywood insiders' favorite unproduced screenplays of 2007. On the other hand, Lucas and Moore's previous screenplay was the Martin Lawrence comedy Rebound. Still, one remains optimistic.
Phillips garnered a lot of fans for Old School in 2003, then stumbled with Starsky & Hutch and School for Scoundrels. Hangover sounds like a return to the Old School paradigm, and that sounds good to me. What do you think?