Jessica Biel Discovers Secret Ancestor on ‘Who Do You Think You Are?’

Check out a sneak peak of this week’s episode of "Who Do You Think You Are?” featuring Jessica Biel!

In the episode, Biel makes surprising discoveries that challenge what she thought knew about her heritage. She also aims to find out the truth behind pieces of family lore. Watch!

"Who Do You Think You Are?” airs Sunday nights on TLC.