Sierra McCormick is an American actress recognized for her versatile performances across various genres in film and television. Born on October 28, 1997, in Asheville, North Carolina, she first gained public attention as a contestant on the game show Are You Smarter Than a 5th Grader? from 2007 to 2008. This early exposure to the entertainment industry set the stage for her transition into acting.

McCormick made her acting debut with a recurring role as Lilith on the acclaimed supernatural series Supernatural in 2008, showcasing her talent among a cast of seasoned actors. She further expanded her repertoire by starring as Scout Thomas in the sitcom Romantically Challenged in 2010, and later appeared as Susan Kushner in the family film Ramona and Beezus alongside Selena Gomez. Her performance in the direct-to-DVD film Spooky Buddies earned her a Young Artist Award, marking a significant achievement in her early career.

However, it was her role as Olive Doyle on the Disney Channel series A.N.T. Farm from 2011 to 2014 that became her breakout performance. The show garnered a dedicated fan base and solidified McCormick's status as a prominent young actress in Hollywood. Following the success of A.N.T. Farm, she began to explore more mature roles, including her performance as Moira in the horror indie film Some Kind of Hate released in 2015.

In 2019, McCormick received critical acclaim for her portrayal of Fay Crocker in the science fiction film The Vast of Night. Her performance was notable enough to earn her a nomination from the Critics' Choice Super Awards, highlighting her growth as an actress capable of handling complex roles. She continued to build on this momentum by taking on challenging characters, such as Melissa in the horror film We Need to Do Something in 2021, and Scarlett Winslow in three episodes of the Hulu anthology series American Horror Stories the same year.

Most recently, McCormick stars as Sybil in the thriller film The Last Stop in Yuma County released in 2023 and is set to appear as Mary Sue in the upcoming action comedy Killing Mary Sue, slated for release in 2025. With a career that continues to evolve and a growing list of impressive credits, Sierra McCormick stands out as a talented actress with a bright future in the entertainment industry.