Seth Aaron Rogen is a Canadian-American actor, comedian and filmmaker. Originally a stand-up comedian in Vancouver, he moved to Los Angeles for a part in Judd Apatow's series Freaks and Geeks in 1999, and got a part on Apatow's sitcom Undeclared in 2001, which also hired him as a writer. Rogen landed a job as a staff writer on the final season of Da Ali G Show (2004), for which the writing team was nominated for a Primetime Emmy Award for Outstanding Writing for a Variety Series. Apatow subsequently guided him toward a film career.

Undeclared is an American sitcom created by Judd Apatow, which aired on Fox during the 2001–02 season. The show has developed a cult following, and in 2012, Entertainment Weekly listed it at #16 in the "25 Best Cult TV Shows from the Past 25 Years".