Actress Jenna Elfman has stepped in to replace Parker Posey in new TV comedy Growing Up Fisher. Posey quit the project after network executives picked up the pilot and ordered a series of episodes from writer D.J. Nash. The timing is perfect for former Dharma & Greg star Elfman, whose White House sitcom 1600 Penn was recently cancelled. The actress will join Eli Baker and J.K. Simmons in the new series about a family coping with divorce. It will debut later this year (13).