
Gatien was born in Kamloops, British Columbia, Canada. She is of half German descent on her dad's side. She began performing at the age of four. She trained for a number of years in dance and musical theater. She was discovered at a model/talent convention and had a number of opportunities in Asia.
In 2009, Gatien played Mia Dearden in two episodes of Smallville. Her other television credits include Supernatural, Bionic Woman, Eureka, The Guard, and roles in the films In the Land of Women and Dr. Dolittle: Tail to the Chief.
In 2010, Gatien was cast as CJ Ward in the Cartoon Network live-action series Tower Prep. She was cast in The CW's 2012 pilot The Selection based on books written by Kiera Cass; however, the pilot was not picked up to series. In 2015 Gatien played the starring role of Jamie in the 1980s horror homage film Lost After Dark.

The Engagement Back-Up
Luna
2022

Love & Where to Find It
Lena
2022

Dying to Be You
Lily Anderson
2020

The Murders
Daria Nichols · (1 episode)
2019

Secret Millionaire
Candice
2018

Ghost Wars
Maggie Rennie · (7 episodes)
2017

Moonlight in Vermont
Haley
2017

Ms. Matched
Annie
2016

Love on the Sidelines
Ava Holland
2016

Colony
Meadow · (4 episodes)
2016

Deeper: The Retribution of Beth
Sam
2015

Sorority Murder
Natalie Swanson
2015

Perfect Match
Lucy
2015

UnREAL
Rita · (2 episodes)
2015

iZombie
Corinne · (3 episodes)
2015

Fifty Shades of Grey
Young Woman at Bar
2015

Lost After Dark
Jamie
2014

Signed, Sealed, Delivered
Vanessa Dougherty · (1 episode)
2014

Spooksville
Kelsey · (1 episode)
2013

The Tomorrow People
Sophie Coburn · (1 episode)
2013

Restless Virgins
Heather
2013

Diary of a Wimpy Kid: Dog Days
Madison
2012

R. L. Stine's The Haunting Hour
Stella · (1 episode)
2010

Tower Prep
CJ Ward · (13 episodes)
2010

Dr. Dolittle: Tail to the Chief
Courtney Sterling
2008

The Guard
Megan · (1 episode)
2008

In the Land of Women
Tiffany
2007

Eureka
Megan · (1 episode)
2006

The Obsession
Erika Matthews
2006

Supernatural
Kristen · (1 episode)
2005

Supernatural
Jenny Plum · (1 episode)
2005

Smallville
Mia Dearden / Speedy · (2 episodes)
2001