Forgetting Sarah Marshall guy Jason Segel has signed on to a new project tentatively titled Undercover Cop. The film is allegedly inspired by the true story of a cop that infiltrated the seedy underbelly of New Jersey’s criminal universe. That sounds like a lot of huge hair. In other news, lesser teen idol Jesse McCartney has signed on to play a lead in the new comics-inspired Locke & Key. Not familiar with McCartney? He possesses approximately 1/4 the eyebrows of Zac Efron, and zero Justin Bieber hair points. [THR, Deadline]