The 40-Year-Old Virgin is starring Steve Carell
[Human]: Do you like The 40 year old virgin ? [Assistant]: Yes!  I'm a big Steve Carell fan, and that movie was important for his career.  Do you like Judd Apatow films?  [Human]: Could you recommend a few? [Assistant]: Sure, he has a lot.  You can check out Knocked Up, Superbad, Anchorman, and Trainwreck, to name a few Judd Apatow films. [Human]: Who is the cast in Superbad ? 
That movie stars Seth Rogen, Jonah Hill, Michael Cera, Emma Stone, and Bill Hader.  Lots of stars!