Sierra McCormick is an American actress. She first became known for participating on the game show Are You Smarter Than a 5th Grader? (2007–2008) before shifting her focus onto acting, receiving attention for portraying Lilith on the television series Supernatural (2008). She soon starred as Scout Thomas on the comedy television series Romantically Challenged (2010), and later received widespread recognition for her role as Olive Doyle on the Disney Channel series A.N.T. Farm (2011–2014).