Starring our favourite funnyman, Russell Brand, Forgetting Sarah Marshall brings on the laughs.

We just got a sneak peek at new comedy Forgetting Sarah Marshall, which is full of big laughs, quotable one-liners and Hawaiian scenery that'll make you want to go on vacation.

The story: TV star Sarah Marshall (Kristen Bell) breaks up with her music writer boyfriend Peter (Jason Segel), who takes the news quite badly. He's shocked. He's depressed. And he decides to go to Hawaii to lift his spirits and get his mind off his troubles. But the plan backfires -- Sarah and her new boyfriend, rocker Aldous Snow (Russell Brand) are staying in the same hotel and poor, broken-hearted Peter can't seem to stop running into the new couple.

The movie's eccentric characters are what make it fun to watch, and Russell Brand tops the bunch when it comes to getting laughs. He sings suggestive songs, wears outlandish outfits and promotes free love to anyone who will listen. Jason Segel seems to have a thing for stripping down -- he appears totally starkers during quite a few important moments in the movie, including when Sarah breaks up with him. Supporting characters, like Paul Rudd, who plays a dim surfer, and Jonah Hill, who plays a hotel employee, also provide a lot of the memorable laugh-out-loud moments.

At the heart of the comedy, though, is a story most people can relate to. Judd Apatow, the film's producer (he also produced The 40-Year-Old Virgin, Knocked Up and Superbad), says: "We've all felt this pain and misery of a boy or girl trouncing on us. Peter is trying desperately to get over his ex, and we find ourselves hoping he does."

Watching Peter try to work through his breakup, make new friends and search for new love in this sweet, semi-rom-com -- the film is being called the "first romantic disaster comedy" -- ends up being two hours you won't want to miss.

Forgetting Sarah Marshall comes out in theatres April 23. You can check out the trailer below.