Celebrities go on an emotional journey to trace their family tree with the help of historians and experts, discovering surprising -- and sometimes shocking -- secrets, mysteries and details about where they came from and who they really are. The well-known stars who explore their ancestry include Matthew Broderick, Spike Lee, Sarah Jessica Parker, Susan Sarandon, Gwyneth Paltrow, Rashida Jones, Rob Lowe, Alfre Woodard, Kelly Clarkson, Aisha Tyler, Jim Parsons, Mandy Moore, Laverne Cox and many more. Lisa Kudrow serves as an executive producer.