Seth Rogen has worked with Judd Apatow.
Funny People is a 2009 American comedy-drama film written , produced and directed by Judd Apatow . Knocked Up is a 2007 American romantic comedy film written , directed , and co-produced by Judd Apatow , and starring Seth Rogen , Katherine Heigl , Paul Rudd , and Leslie Mann . Seth Rogen . After landing his job as a staff writer on the final season of Da Ali G Show , for which he and the other writers received an Emmy Award nomination , he was guided by Judd Apatow toward a film career . After Rogen received critical praise for his performance , Universal Pictures agreed to cast him as the lead in Apatow 's films Knocked Up and Funny People .