Will Ferrell has signed on for 4 episodes of "The Office."  No word on when they'll air, but he offered to do it because he loves the show and he's good friends with Steve Carell.  He wanted to  commemorate his final season by doing something on the show.

Ferrell will play a branch manager who comes from the home office.  He's agreed to one episode after Carell leaves...so let the rumors start!