Sierra McCormick

In 2018, McCormick starred in a series of indie films, which include The Honor List, The Neighborhood Watch and Pretty Little Stalker. In 2019, she co-starred in the science fiction film The Vast of Night, starring as Fay Crocker. The film received critical acclaim, and the performances of the lead cast were praised. For her role, she received a special mention from the Jury Awards at the Hamptons International Film Festival. In the same year, she starred as Katie Sullivan in the Lifetime television film Who Stole My Daughter?.

In 2015, McCormick starred in the horror movie Some Kind of Hate, which premiered at various film festivals. Her performance, along with the rest of the cast, was received positively. For her performance, she received a Fright Meter Award nomination. In 2016, she appeared as Sarah in the Lifetime television film Sorority Nightmare. In 2017, she starred as Kara Gentry in the film Christmas in the Heartland, which was originally made for television, but was later released direct-to-video.

In 2011, she appeared in the television film A Nanny for Christmas. In the same year, she voiced Alice in the Disney direct-to-video film Spooky Buddies. McCormick, along with the cast of the film, won a Young Artist Award for their performances. Later in 2011, McCormick was cast for the role of Olive Doyle, a girl with an eidetic memory, in the Disney Channel series A.N.T. Farm. She was chosen after an audition where she continuously spoke about tigers. Dan Signer stated: "And as I heard her continually talking about tigers, I thought, 'That's just how Olive would sound.' Which is how Sierra got that part." According to an interview with McCormick, getting the role was easy because she and McClain were already friends from their previous work experience.

From 2011 to 2014, McCormick held a recurring role on the Disney Channel sitcom Jessie as Connie, a girl obsessed with the main character, Luke.

McCormick made her film debut starring as Susan Kushner in the comedy film Ramona and Beezus (2010), and has since voiced Alice in the direct-to-DVD film Spooky Buddies (2011), starred as Moira in the indie film Some Kind Of Hate (2015), and co-starred as Fay Crocker in the science fiction film The Vast of Night (2019).

In 2010, McCormick starred in the comedy film Ramona and Beezus as Susan Kushner, the rival of the title character, Ramona Quimby. The film was received positively, with the acting ensemble being praised for their performances. In the same year, she was cast as Scout Thomas, the daughter of Rebecca Thomas, in the comedy television series Romantically Challenged, which was cancelled after a season.

McCormick first began acting in 2007 at the age of nine, making an uncredited cameo on the television series 'Til Death. In 2007, she beat out thousands of other children to be cast in the second season of the game show Are You Smarter Than a 5th Grader? as one of the students. Following a guest appearance on the Disney Channel series Hannah Montana in 2008, she co-starred with China Anne McClain in the film Jack and Janet Save the Planet. In the same year, she appeared as Lilith on two episodes of the fantasy television series Supernatural.

McCormick was born and raised in Asheville, North Carolina, with her sister Kayla. She moved to Los Angeles, California in 2006, after expressing an interest in acting. She has a dog named Annie, with whom she appeared in a PETA ad campaign promoting the adoption of shelter animals.

Sierra McCormick (born October 28, 1997) 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).