Do not call Forgetting Sarah Marshall a Judd Apatow movie.

The word "penis" is seldom brought up in celebrity interviews. And it's not like I'm on the phone with, say, Kevin Bacon or Viggo Mortensen. The man on the other line is Nick Stoller, director of Forgetting Sarah Marshall, the latest crowd pleaser from the Judd Apatow factory. And still, over the course of our twenty-minute conversation, we pay tribute to "penis" six times. This, after all, is not an illuminating exploration into the psyche of the next Orson Welles—but that's not to say that Stoller isn't a genius in his own right. A Harvard graduate (where he wrote for The Harvard Lampoon), Stoller first teamed up with Apatow on the short-lived but much-loved FOX series "Undeclared." He went on to co-write 2005's Fun With Dick and Jane (there it is again!), and is now days away from the release of his directorial debut starring Jason Segel, Kristin Bell, Mila Kunis, and a whole army of comedic heavyweights. It's about a man (Segel) who travels to Hawaii after getting dumped by his TV star girlfriend (Bell), only to find that she's shacked up with her new rock star boyfriend (Russell Brand) at the same resort. Hilarious pig roasts, luaus, and crippling humiliation ensue. Bookended by alohas, Stoller discusses his new Muppets movie, the soul-crushing tedium of directing a film, and Billy Baldwin's unhealthy obsession with David Caruso.