Video: Sneak Peek - Zooey Deschanel & More Set for TLC's WHO DO YOU THINK YOU ARE?

TLC premieres a brand-new season of the fan-favorite reality series Who Do You Think You Are? on Tuesday, July 23, with eight episodes featuring celebrities on a journey into their own personal histories. TLC has ordered eight new hour-long episodes of the Emmy-nominated series.

Today, the network announces the full line-up of contributors who will embark on a remarkable exploration of their surprising pasts, revealing unknown details about themselves and their families:

Christina Applegate
Kelly Clarkson
Cindy Crawford
Zooey Deschanel
Chelsea Handler
Chris O'Donnell
Jim Parsons
Trisha Yearwood

TLC's Who Do You Think You Are? opens the door to the fascinating real life stories of some of the most well known names in America, sharing how the eye-opening revelations they uncover about their backgrounds will impact their lives. Ancestry.com, the world's largest online family history resource, is teaming up with TLC as a sponsor of the upcoming season. As part of the show sponsorship, Ancestry.com provides exhaustive family history research on each of the featured celebrities, which is used to frame the story of each episode.

Keep up with Who Do You Think You Are? on Social Media with hashtag #WDYTYA and at the TLC.com site http://www.tlc.com/tv-shows/who-do-you-think-you-are.

Who Do You Think You Are? Is produced for TLC by Shed Media US and Is or Isn't Entertainment. The series is based on an original format created by Wall to Wall Media and Alex Graham.

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