By Margaret Lyons
Updated March 24, 2009 at 01:46 PM EDT

NBC’s upcoming reincarnation of Parenthood is fleshing out its cast. Peter Krause and Maura Tierney are set to star as brother and sister, and Craig T. Nelson will play their father, according to the Hollywood Reporter. Mae Whitman will play Tierney’s rebellious teenage daughter, Sarah Ramos will play Krause’s daughter, and Dax Shepard will play Krause and Tierney’s youngest sibling.