Emily VanCamp (Everwood) will join the cast of the hit drama series Brothers & Sisters as a series regular later this season in her second time teaming with executive producer Greg Berlanti. VanCamp will play Rebecca Harper, the daughter of William Walker (Tom Skerritt) and mistress Holly Harper (Patricia Wettig), whose existence has been kept secret for twenty years. The series airs Sundays (10:00-11:00 p.m., ET) on the ABC Television Network.