"Friends" actress turned executive producer Lisa Kudrow joined "Extra" at The Grove on Friday to talk about her emotional show, "Who Do You Think You Are?" on NBC. The show follows celebrities as they trace their family roots to discover surprising stories of tragedy, success and bravery.

Kudrow tells Mario Lopez about the first episode of the second season which features Vanessa Williams learning something new about both her great-great-grandfathers. Other celebrity appearances on the show will include Steve Buscemi, Gwyneth Paltrow, Tim McGraw, Rosie O'Donnell, Ashley Judd, Lionel Richie and Kim Cattrall.

Watch "WDYTYA," which airs tonight at 8:00 PM on NBC.

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