Sierra McCormick (b. October 28, 1997) played the character Lillith in the series Supernatural. She appears in seasons 3 and 4 only.
Sierra is an American actress who has appeared in episodes of A.N.T. Farm, Teens Wanna Know and CSI: Crime Scene Investigation, among others. She has also appeared in the movies Ramona and Beezus and Spooky Buddies.