Struggling musician Peter Bretter (Jason Segel) has spent six years idolizing his girlfriend, television star Sarah Marshall (Kristen Bell). While writing a Muppet-type Dracula musical, he's the guy left holding her purse in paparazzi photos and accidentally omitted from acceptance award speeches. Things take a twist when she breaks up with him, and Peter suddenly finds himself alone. After an unsuccessful bout of womanizing and an on-the-job nervous breakdown, he sees that not having Sarah may just ruin his life.
To clear his head, Peter takes an impulsive trip to Hawaii, where he is confronted by his worst nightmare: Sarah and her narcissistic and tragically-hip, new British-rocker boyfriend, Aldous (Russell Brand), are staying at his hotel. As he torments himself with the reality of Sarah's new life, he finds relief when flirting with Rachel (Mila Kunis), a beautiful resort employee whose laid-back approach tempts him to rejoin the world.
As of April 16, 2008, the review aggregator Rotten Tomatoes reported that 88% of critics gave the film positive reviews, based on 25 reviews. An early review on Ebert&Roeper gave it positive reviews.Richard Roeper said that it was an "instant classic" and that if he ever made a list of his current top 50 comedies, he'd find some way to put this movie on the list.