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Sierra McCormick

Acting Born Oct 28, 1997 Asheville, North Carolina, USA 47 credits

Biography

Sierra McCormick is an American actress born on October 28, 1997. She initially gained recognition for participating in the game show Are You Smarter Than a 5th Grader? from 2007 to 2008. McCormick made her acting debut with a recurring role as Lilith on the television series Supernatural in 2008. She also appeared in the comedy television series Romantically Challenged as Scout Thomas in 2010, the direct-to-DVD film Spooky Buddies as Alice, for which she won a Young Artist Award, and the comedy film Ramona and Beezus as Susan Kushner in 2010. McCormick had her breakthrough starring as Olive Doyle on the Disney Channel series A.N.T. Farm from 2011 to 2014.

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Known for

Film

The Last Stop in Yuma County

as Sybil
Film

Camp

as Lily
Film

Music in the Attic

as Scarlett Winslow
Film

The Vast of Night

as Fay Crocker

Jessie

as Connie Thompson

A.N.T. Farm

as Olive Doyle
Film

Ramona and Beezus

as Susan
Film

Land of the Lost

as Tar Pits Kid

Hannah Montana

as Gillian

Supernatural

as Lilith

Supernatural

as Zoey

Medium

as Adolescent Allison

Frequent co-stars

Joey King 2 shared titles
Debby Ryan 1 shared title
Peyton List 1 shared title
Cameron Boyce 1 shared title
Karan Brar 1 shared title
Skai Jackson 1 shared title
Kevin Chamberlin 1 shared title
Amy Farrington 1 shared title
Chris Galya 1 shared title
Phill Lewis 1 shared title

Career timeline

After AllKilling Mary SueBig Baby
The Last Stop in Yuma CountyActing Out
CampThe Nana ProjectEdge of Everything
Exploited
American Horror StoriesWe Need to Do Something
The Vast of NightAll Good ThingsWho Stole My Daughter?VFW
Seduced by My NeighborPretty Little StalkerThe Honor ListThe Neighborhood Nightmare
Christmas in the Heartland
Sorority Nightmare
Some Kind of Hate
JessieA.N.T. FarmSpooky BuddiesDisney's Friends for Change Games
A Nanny for ChristmasRamona and BeezusRomantically Challenged
Land of the LostThe Dog Who Saved Christmas
Are You Smarter Than a 5th Grader?
Hannah Montana
SupernaturalSupernaturalMedium
Boston Legal
NCIS
Monk
CSI: Crime Scene InvestigationCurb Your Enthusiasm

Full filmography

  • After All (2025) as Monica
  • Killing Mary Sue (2025) as Mary Sue
  • Big Baby (2025)
  • The Last Stop in Yuma County (2024) as Sybil
  • Acting Out (2024) as Sierra
  • Camp (2023) as Lily
  • The Nana Project (2023) as Sarah
  • Edge of Everything (2023) as Abby
  • Exploited (2022) as Chloe
  • American Horror Stories (2021) as Scarlett Winslow
  • We Need to Do Something (2021) as Melissa
  • The Vast of Night (2019) as Fay Crocker
  • All Good Things (2019) as Bailey
  • Who Stole My Daughter? (2019) as Katie Sullivan
  • VFW (2019) as Lizard
  • Seduced by My Neighbor (2018) as Allie
  • Pretty Little Stalker (2018) as Bridget
  • The Honor List (2018) as Charlotte
  • The Neighborhood Nightmare (2018) as Allie
  • Christmas in the Heartland (2017) as Kara Gentry
  • Sorority Nightmare (2016) as Sarah
  • Some Kind of Hate (2015) as Moira
  • Jessie (2011) as Connie Thompson
  • A.N.T. Farm (2011) as Olive Doyle
  • Spooky Buddies (2011) as Alice
  • Disney's Friends for Change Games (2011) as Self
  • A Nanny for Christmas (2010) as Jackie Ryland
  • Ramona and Beezus (2010) as Susan
  • Romantically Challenged (2010) as Scout Thomas
  • Land of the Lost (2009) as Tar Pits Kid
  • The Dog Who Saved Christmas (2009) as Kara Bannister
  • Are You Smarter Than a 5th Grader? (2007)
  • Hannah Montana (2006) as Gillian
  • Supernatural (2005) as Lilith
  • Supernatural (2005) as Zoey
  • Medium (2005) as Adolescent Allison
  • Boston Legal (2004) as Daniella
  • NCIS (2003) as Sally Clark
  • Monk (2002) as Anne Marie
  • CSI: Crime Scene Investigation (2000) as Gracie Layman
  • Curb Your Enthusiasm (2000) as Emma
  • GUM as Eden
  • Sigil
  • Burnouts
  • Last Chance Motel
  • Building Blocks as Adult Desariee
  • I Don't Want to Drink Your Blood Anymore