The best: "Get Him to the Greek" (2010)
More a spin-off than a sequel, “Greek” takes Aldous Snow—Russell Brand’s debauched-British-rocker from Jason Segel’s “Forgetting Sarah Marshall”—and positions him front and center. Fledgling record-company intern Aaron (Jonah Hill, who played a totally different character in “Marshall”) is tasked with transporting Aldous from London to L.A. for a concert.
The journey the two take includes enough detours into sex-drugs-and-booze territory to merit the R rating. And yet, like most classic road movies, “Greek” is really fueled by winning comedic chemistry between its leads, and a couple of colorful supporting turns (courtesy of Sean “P. Diddy” Combs as Aaron’s hilariously profane boss and pre-“Bridesmaids” Rose Byrne as Aldous’ pop tart soul mate).