Jenna Elfman and Amy Smart have been tapped as the leads of CBS' comedy pilot "Accidentally on Purpose" and ABC's drama pilot "See Cate Run," respectively.

The casting of Elfman lifts the contingency on "Accidentally."

The project, from CBS Par and BermanBraun, revolves around Billie (Elfman), a San Francisco movie critic who finds herself "accidentally" pregnant after a fling with a younger man, and the unconventional family that comes from this "mistake."

"Dharma & Greg" alumna Elfman next appears in the indie comedy "Love Hurts."

The ABC Studios-produced "Cate" (formerly "I, Claudia") centers on a young prosecuting attorney (Smart) who one day is going to be a serious contender for president of the U.S.