Colbert also asked Kudrow about an upcoming episode of Who Do You Think You Are?, her TV series that helps celebrities discover their roots and genealogy.
Season 7 of the show, which premieres on TLC on March 5, features a number of famous actors, including John Stamos, Jessica Biel, and Kudrow's former Friends castmate, Courteney Cox.
Kudrow spoke highly of her friend.
And went into detail about what Cox discovered in her family's history.
Apparently, they were responsible for killing the King of England.
