Bradley Cooper, Ed Helms to star in 'Hangover'

Film is bachelor-party comedy about three friends

Bradley Cooper and Ed Helms are getting ready to have a "Hangover."

The pair is in final negotiations to star in the Todd Phillips bachelor-party comedy, about three friends who lose the groom at their Vegas fandango two days before the wedding. The third lead role has yet to be cast.

The project, a spec which Warners acquired from Jon Lucas and Scott Moore last fall, is moving forward quickly, with cast and crew now entering preproduction.

Legendary Pictures will finance and co-produce the comedy. Phillips will direct and produce under his Green Hat Films banner; Dan Goldberg will produce and Scott Budnick will exec produce.

The project marks Helms' first lead feature role to date. The "Daily Show" and "Office" veteran has roles in the upcoming Eddie Murphy comedy "Meet Dave" and Neal Brennan's "The Goods: The Don Ready Story."

Cooper next stars in Christian Alvart's "Case 39" for Paramount and Warners' Jennifer Aniston-toplined romantic comedy "He's Just Not That Into You."

Phillips, who last directed "School for Scoundrels" for Dimension, plans on shooting the supernatural comedy "Man-Witch" after he wraps "Hangover."