Sarah Michelle Gellar joins Robin Williams' 'Crazy Ones' CBS pilot

"Buffy the Vampire Slayer" herself, Sarah Michelle Gellar, is attempting a return to TV. The actress was last seen on CW's "Ringer," which was canceled after one season in early 2012. This time, she's looking to make the audience laugh, and she's got a secret weapon named Robin Williams. 

THR reports Gellar has signed on to co-star with Williams in the CBS pilot "Crazy Ones." The show is a single-camera comedy, about an advertising agency run by a father and daughter. Williams plays Simon Roberts, while Gellar plays his driven, yet practical daughter, Sydney.

The pilot's script is written by TV veteran David E. Kelley, who is also the show's producer. If the show goes to series, it would be Williams' first since "Mork & Mindy" ended in 1982.