Childish as it may seem, the opening sequence of Forgetting Sarah Marshall, where Peter (Jason Segel) remains entirely naked whilst being dumped by his celebrity girlfriend, is hilarious.

Had he done such a scene fully clothed, with tears pouring down his heartbroken face, we’d have thought we were about to endure another predictble cheesy chick flick, but the frequent full body shots show that this is quite the opposite.

Based on the premise that this film was written by the same people who brought us Knocked Up, I thought I would be in for a good time but I didn’t actually expect this movie to tickle me quite so much as it did.

It seemed my fellow cinema goers were equally amused by the fare on offer as there was very seldom a scene without someone laughing out loud.

The film tells the story of Peter and his emotional recovery after the love of his life ups and leaves him for another man.

Sarah Marshall (Kristen Bell), star of a highly rated crime drama, for which Peter writes the theme music, drops him from a great height, leaving him to begin a series of one night stands in a bid to get over her.

After having his heart broken, Peter heads to Hawaii to try and forget Sarah, but as luck and Hollywood would have it, he runs into the girl herself with her new lover – superstar lothario Aldous Snow, played by Russell Brand.

I say played by, Brand basically plays himself with a different name, but as a big fan of his anyway, I found this extremely entertaining.

He’s probably the last man on earth you’d want to date your ex. He’s flamboyant, he’s overwhelmingly open about his sexual ability, and he’s not exactly displeasing to look at either.

His character, Aldous Snow, is a grinding British rock star who is flocked by men and women alike wherever he goes.