Struggling musician Peter (Jason Segel, left) talks to surfer Chuck (Paul Rudd) about the heartbreak of being dumped. (Photo provided by Universal Studios)

So what's a guy to do when his girlfriend dumps him?

If you're Jason Segel, you try "Forgetting Sarah Marshall," and we get to laugh at your heartbreak.

The latest effort in the Judd Apatow films, "Marshall" isn't the home run that some of his other movies were (he directed "Knocked Up" and "The 40-Year-Old Virgin"). This time. Apatow is producing, with mixed success.

Segel ("Knocked Up") plays Peter Bretter, a musician whose titular TV-star girlfriend (Kristen Bell of TV's "Veronica Mars") suddenly dumps him.

Peter is crushed, and at the urging of his brother (Bill Hader of "Saturday Night Live") he takes a solo trip to Hawaii ..... straight to the hotel where Sarah and her new rock-star boyfriend (Russell Brand) are staying.

There, Peter catches the eye of a lovely concierge (the ravishing Mila Kunis), but still pines for Sarah.

Freshman director Nicholas Stoller employs Apatow's sweet-and-sour approach to romantic comedy, combining raunchiness with characters who maintain a sense of innocence even as they spout off about sex and bodily functions.

It's easy to connect with Peter, who manages to appear vulnerable without losing his charm. He feels more real than the typical good-looking and vapid leading man you might find in the average Kate Hudson flick.

Though believably shallow, Sarah remains a well-rounded character. She's not cruel to Peter for the film's sake, and she is even allowed a little levity later on.

Kunis, as the concierge, is a less-than-impressive actress. But, with her enchanting doe eyes and sense of adventure, she'll likely find herself in a starring role before long.

The usual Apatow suspects are around, including Jonah Hill, who plays an obsessive fan of Sarah's new boyfriend, and Paul Rudd, who is a flighty surf instructor.

Brand is hysterically funny as Sarah's boyfriend Aldos Snow, a British rocker.

Also stealing scenes is Jack McBrayer (of TV's "30 Rock") as a conservative newlywed who is shocked at the things his wife wants to do on their honeymoon. He plays up his Kenneth persona to a T.

It doesn't have the polish of "Virgin" or "Knocked Up," and some of the laughs feel more manufactured, but with that charm and a sense of fun most romcoms don't have, "Marshall" gives you plenty to love, and little to forget.