Who Do You Think You Are? 2014 Season

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 Wednesday, July 23 at 9PM ET/PT with five all-new episodes and a brand new list of contributors. The series is Executive Produced by Lisa Kudrow and Dan Bucatinsky.

This year's line-up of participants who will embark on this one-of-a-kind experience include Valerie Bertinelli, Jesse Tyler Ferguson, Kelsey Grammer, Rachel McAdams and her sister, Kayleen McAdams, and Cynthia Nixon