News EXCLUSIVE: Jessica Biel Discovers Her Ancestors Were Jewish on 'Who Do You Think You Are?' -- Watch! By Elisa Osegueda 1:18 PM PDT, March 31, 2017 This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page. 56:25EXCLUSIVE: Jessica Biel Discovers Her Ancestors' Jewish History …02:38'Foundation' Sneak Peek: Everything to Know About Apple TV Plus'…03:48Kim Kardashian Says She ‘Loves’ Kourtney and Travis Barker’s Rel…03:01Lil Nas X Goes Into 'Labor' After No One Shows Up For His Baby S…10:10‘DWTS’: Tyra Banks Defends Olivia Jade After Casting Backlash (E…03:53Gabrielle Union Was ‘Broken Into Pieces’ After Dwayne Wade Had a…20:13‘RHOP’: Gizelle Bryant on Her Truce With Karen Huger and Fallout…03:20NeNe Leakes Talks 'Adjusting to New Normal' After Husband Gregg'…01:47‘Ghost Adventures: Goldfield Hotel’ Trailer: Watch Zak Bagans Re…03:11Jennifer Lopez and Ben Affleck Plan to Spend the Holidays Togeth…02:46'Darcey & Stacey': Watch Stacey Get a Psychic Reading About Her …09:42Nicola Coughlan Talks Possible Kim Kardashian Cameo in ‘Bridgert…04:11Emmys 2021: Jason Sudeikis Opens Up About ‘Ted Lasso’s 20 Nomina…02:41Catherine Zeta-Jones Explains Why She’s Excited to Play Morticia…02:26Samira Wiley Makes Emmys 2021 a Date Night and Talks ‘The Handma…03:49Emmys 2021: Evan Peters and Julianne Nicholson (Mare of Easttown…02:52Tracee Ellis Ross Admits She's Already Crying Over End of 'Black…04:12Emmys 2021: Lorne Michaels ('SNL') Full Backstage Interview02:26Angela Bassett Shares 'Black Panther 2' Update After Letitia Wri… Jessica Biel gets a big surprise on this week's episode of Who Do You Think You Are?. The 35-year-old actress joined the uber popular TLC series to debunk several stories of her family's history, and only ET has an exclusive sneak peek. WATCH: Courteney Cox Uncovers Shocking Royal Family Drama in 'Who Do You Think You Are?' PremiereIn the preview clip, Biel is shocked to find out that her ancestors were Jewish. "Wow, I've never heard of this before in my family," Biel says. "That's kind of a big deal to not know about.""That sort of changes everything," she adds. EXCLUSIVE: Julie Bowen Learns Her Ancestors Fought to End Slavery on 'Who Do You Think You Are?' -- Watch!This season, the show will also follow Julie Bowen, Courteney Cox, Jennifer Grey, Smokey Robinson, John Stamos, Noah Wyle and Liv Tyler.Watch the exclusive clip above. Who Do You Think You Are? airs Sunday at 10 p.m. ET/PT, 9 p.m. CT on TLC.EXCLUSIVE: Courteney Cox Discovers Royal Drama in 'Who Do You Think You Are?' Premiere This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page.