Sierra McCormick is an eighteen years old american actor.McCormick was born on October 28, 1997 in Asheville, North Carolina, USA as Sierra Nicole McCormick. She is known for her role as Olive Doyle on the Disney Channel series A.N.T. Farm and her participation on the game show Are You Smarter Than a 5th Grader?. She also played Lilith in Supernatural.She has acted in many movies like Land of the Lost,Ramona and Beezus,A Nanny for Christmas,Spooky Buddies.She has also worked in TV and her works include Are You Smarter Than a 5th Grader?,Curb Your Enthusiasm,Boston Legal,Supernatural,Criminal Minds.