All in the family! Get to know these stars' brothers and sisters
Chad and Rob Lowe
One of the original "Brat Pack" members, 1980s film star Rob, of The Outsiders and St. Elmo's Fire fame, went on to appear on TV's The West Wing. His brother Chad, Hilary Swank's ex-husband, stars on Pretty Little Liars and won an Emmy for his role on TV's Life Goes On.
Credit: Lester Cohen/WireImage.com