Jesse Tyler Ferguson, Cynthia Nixon Among Stars Set for New Season WHO DO YOU THINK YOU ARE?

Last summer's season of Who Do You Think You Are? led some of the world's most famous celebrities to make remarkable discoveries - from finding they were descended from European royalty to learning that their ancestors were involved in wars that changed the course of America. Throughout these journeys, they ultimately had a chance to make modern connections to the people in their lineage that were a part of history.

The Emmy-nominated series is back on TLC this summer with six all-new episodes and a brand new list of contributors. Executive Produced by Lisa Kudrow and Dan Bucatinsky, Who Do You Think You Are? continues to delve into the personal family histories of some of the most public names. The season premieres Wednesday, July 23 at 9/8c.

This year's line-up of participants who will embark on this one-of-a-kind experience includes:

Valerie Bertinelli

Jesse Tyler Ferguson

Lauren Graham

Kelsey Grammer

Rachel McAdams and her sister, Kayleen McAdams

Cynthia Nixon

Additionally, TLC has acquired ten episodes from NBC's previous seasons of the series, which will air in conjunction with this year's new premieres on Wednesday nights. These episodes will feature the family histories of Matthew Broderick, Lisa Kudrow, Rob Lowe, Reba McEntire, Tim McGraw, Gwyneth Paltrow, Sarah Jessica Parker, Brooke Shields, Vanessa Williams and Rita Wilson.

Ancestry.com, the world's largest online family history resource, is teaming up again 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 build out the story of each episode.

Last summer's season of TLC's Who Do You Think You Are? averaged 1.8M P2+ viewers. The series 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.

Photo Credit: Walter McBride / WM Photos

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