Family trees can hide some chilling secrets. Join us as we count down our picks for the most unsettling ancestry bombshells uncovered on Who Do You Think You Are? Our list includes Lisa Kudrow, Regina King, Sarah Jessica Parker, Courteney Cox, John Stamos, Rashida Jones, and more, with revelations spanning witch trials, royal scandal, abandonment, and the Holocaust. Which discovery hit you hardest? Share your thoughts in the comments.
