In reprising his role from 'Forgetting Sarah Marshall,' Russell Brand gets some surprisingly comic-relief help from none other than Sean "P. Diddy" Combs in the spin-off 'Get Him to the Greek.'

Outside of dating singer Katy Perry, Brand is not an household name in America, but with Diddy on the scene, playing (what else?) a music exec, the movie is a very funny, often outrageous take on the music industry.

Directed by Nicholas Stoller, Jonah Hill plays Aaron Green, a record company intern looking to raise his status. When sales are down and head honcho Sergio Roma (played by Combs) looks for suggestions from employees to help bring back the company's fortune, Aaron talks about doing a 10-year anniversary of British rock singer Aldous Snow's live concert.

Sounds like a good idea, considering Aldous could use this as comeback after releasing his worst album, including a song and video called 'African Child' that many felt was racist.

Getting Aldous to leave from London to Los Angeles for the concert is not an easy task, though. Aside from arguing with his doctor girlfriend (played by Elizabeth Moss) back home, problems continue to rise as Aldous drags Aaron around town, subjecting him to women, booze and drugs.

Taking his supporting role from 'Sarah Marshall' to 'Greek,' Brand is just hilarious. In watching these two films, one never knows when Brand's humor is off. Is his real-life persona the same? The guy just makes you laugh out loud. For once, Hill is the guy who tries to keep a straight face. But he does manage to deliver some poignant scenes with Moss of TV's 'Mad Men.'

Considering the best lines in the film, the scene stealer and standout is Combs. In his first big-screen role since 2001's 'Monster's Ball,' Diddy is having a ball playing a music exec. It's almost as if the producers told him to be himself, but with some comedic flair.

All told, 'Greek' is a buddy flick that works because it never runs out of steam or humor.