Sierra McCormick

Sierra McCormick

Sierra McCormick (born October 28, 1997) is a European-American businesswoman, entrepreneur, actress and producer, best 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?. McCormick was born in Asheville, North Carolina. She moved to Los Angeles, California at a young age. McCormick first took an interest in acting in 2006 when she joined The Corsa Agency in Los Angeles. Her first onscreen appearance was uncredited, in the television series 'Til Death at the age of nine. 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? She also guest starred on the Disney Channel series Hannah Montana in the 2008 episode "Welcome to the Bungle". She also co-starred with McClain in the film Jack and Janet Save the Planet. McCormick's other credits include the film Ramona and Beezus in 2010 as Susan Kushner and the television film A Nanny for Christmas in 2011. In 2011, she was chosen for the role of Olive, a girl with an eidetic memory, in the Disney Channel series A.N.T. Farm. She was cast after an audition where she continually talked 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 China were already friends from their previous work experience. McCormick currently lives in Los Angeles, California with her parents and sister Kayla. She has a dog named Annie, with whom she appeared with in a PETA ad campaign promoting the adoption of shelter animals.

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Known For

Filmography

2025

Killing Mary Sue
Killing Mary Sue
as Mary Sue
Movie - Released: 6/13/2025
After All
After All
as Monica
Movie - Released: 11/7/2025

2024

The Last Stop in Yuma County
The Last Stop in Yuma County
as Sybil
Movie - Released: 5/10/2024
Acting Out
Acting Out
as Sierra
Movie - Released: 10/14/2024

2023

Edge of Everything
Edge of Everything
as Abby
Movie - Released: 6/25/2023
The Nana Project
The Nana Project
as Sarah
Movie - Released: 9/14/2023
Camp
Camp
as Lily
Movie - Released: 10/27/2023

2022

Exploited
Exploited
as Chloe
Movie - Released: 1/28/2022

2021

We Need to Do Something
We Need to Do Something
as Melissa
Movie - Released: 9/3/2021
American Horror Stories
American Horror Stories
as Scarlett Winslow
TV - Released: 7/15/2021

2019

The Vast of Night
The Vast of Night
as Fay Crocker
Movie - Released: 6/1/2019
All Good Things
All Good Things
as Bailey
Movie - Released: 7/29/2019
VFW
VFW
as Lizard
Movie - Released: 9/21/2019
Who Stole My Daughter?
Who Stole My Daughter?
as Katie Sullivan
Movie - Released: 8/1/2019

2018

Seduced by My Neighbor
Seduced by My Neighbor
as Allie
Movie - Released: 11/11/2018
The Honor List
The Honor List
as Charlotte
Movie - Released: 5/11/2018
Pretty Little Stalker
Pretty Little Stalker
as Bridget
Movie - Released: 12/11/2018
The Neighborhood Nightmare
The Neighborhood Nightmare
as Allie
Movie - Released: 6/8/2018

2017

Christmas in the Heartland
Christmas in the Heartland
as Kara Gentry
Movie - Released: 11/14/2017

2016

Sorority Nightmare
Sorority Nightmare
as Sarah
Movie - Released: 8/6/2016

2015

Some Kind of Hate
Some Kind of Hate
as Moira
Movie - Released: 5/2/2015

2011

Spooky Buddies
Spooky Buddies
as Alice
Movie - Released: 9/20/2011
A.N.T. Farm
A.N.T. Farm
as Olive Doyle
TV - Released: 5/6/2011
Disney's Friends for Change Games
Disney's Friends for Change Games
as Self
TV - Released: 6/24/2011
Jessie
Jessie
as Connie Thompson
TV - Released: 9/30/2011

2010

A Nanny for Christmas
A Nanny for Christmas
as Jackie Ryland
Movie - Released: 11/23/2010
Ramona and Beezus
Ramona and Beezus
as Susan
Movie - Released: 7/23/2010
Romantically Challenged
Romantically Challenged
as Scout Thomas
TV - Released: 4/19/2010

2009

The Dog Who Saved Christmas
The Dog Who Saved Christmas
as Kara Bannister
Movie - Released: 11/9/2009
Land of the Lost
Land of the Lost
as Tar Pits Kid
Movie - Released: 6/5/2009

2007

TV
Are You Smarter Than a 5th Grader?
TV - Released: 9/26/2007

2006

Hannah Montana
Hannah Montana
as Gillian
TV - Released: 3/24/2006

2005

Medium
Medium
as Adolescent Allison
TV - Released: 1/3/2005
Supernatural
Supernatural
as Lilith
TV - Released: 9/13/2005
Supernatural
Supernatural
as Zoey
TV - Released: 9/13/2005

2004

Boston Legal
Boston Legal
as Daniella
TV - Released: 10/3/2004

2003

NCIS
NCIS
as Sally Clark
TV - Released: 9/23/2003

2002

Monk
Monk
as Anne Marie
TV - Released: 7/12/2002

2000

CSI: Crime Scene Investigation
CSI: Crime Scene Investigation
as Gracie Layman
TV - Released: 10/6/2000
Curb Your Enthusiasm
Curb Your Enthusiasm
as Emma
TV - Released: 10/15/2000

Unknown

Movie
Burnouts
Movie
Movie
Building Blocks
as Adult Desariee
Movie
Sigil
Sigil
Movie