Her first notable role was as Marissa Chandler on All My Children from 2009 to 2010, for which she received a Daytime Emmy Award for Outstanding Younger Actress in 2011.

She went on to appear in several TV series, with recurring roles in the Canadian drama Bomb Girls and the American science fiction western Defiance on the Syfy network.

[citation needed] In 2014, she played the lead role in the science fiction horror film Extraterrestrial, directed by Colin Minihan of The Vicious Brothers, with whom Allen started an ongoing personal and professional relationship.

[3] In 2015, Allen starred in the psychological thriller Backgammon and contributed to the writing of the story for the independent comedy-drama film, Almost Anything.

[16] Allen won the Daytime Emmy Award for Outstanding Younger Actress in a Drama Series in 2011 for playing Marissa Tasker on All My Children.