Written and produced by David E. Kelly, the show is about a father and daughter who run an advertising agency together.
Gellar starred on the iconic supernatural series "Buffy the Vampire Slayer."
Williams is an Oscar-winning actor and stand-up comedian. His film credits include "Good Morning, Vietnam," "Good Will Hunting," "Dead Poets Society," "Awakenings" and "The Birdcage."
DISCUSS AND COMMENT ON THIS STORY Reality TV World now offers Facebook Comments on our stories. To post a comment, log into Facebook and then 'Add' your comment. To report spam or abuse, click the 'X' in the upper right corner of the comment box.