Nicholas Stoller directed the 2008 romantic comedy "Forgetting Sarah Marshall," which features Jason Segel as Peter, a musician from Los Angeles who writes music for a detective series starring his girlfriend, Sarah Marshall (Kristen Bell). Following their breakup, he goes on vacation to Hawaii, where he unexpectedly finds himself sharing a resort with his former partner and her new rock star boyfriend (Russell Brand). Mila Kunis portrays a concierge at the resort who shows an interest in Peter. The film is generally funny and enjoyable, with Segel being quite likeable as the main character and Bell charming and appealing as his ex. Brand shines as a rock icon reminiscent of Jim Morrison, delivering genuinely hilarious stage performances that satirize stereotypical rock star behavior. The Hawaiian resort settings are particularly well-done, and there are several cameos from familiar faces including Bill Hader, Jack McBrayer, Maria Thayer, Taylor Wily, Paul Rudd, Da'Vone McDonald, and Jonah Hill. However, the movie contains some unexpected NC-17 style scenes that I found jarring, especially since it was advertised as an ‘R’ rated film. These include several depictions of simulated sexual activity, one involving oral sex, and full nudity appearing very early on (it’s quite startling). I chose to overlook or laugh along with these moments; this information is for anyone who might be bothered by a movie that includes explicit content. The movie has a running time of 1 hour and 51 minutes and was filmed in O'ahu, Hawaii, as well as Los Angeles, with studio work completed at Universal City, CA. Jason Segel wrote the screenplay. My grade would be a B, but the adult scenes significantly detract from it for me, bringing it down to more of a ‘D.’

Source on TMDB