Having started as a child actress in television series, she has appeared in numerous film and theatre roles.
[citation needed] Rooper expressed a wish to be an actress at the age of nine and contacted an agent.
Her next appearance was in the supernatural drama Hex where she played a lovable lesbian ghost named Thelma.
In December 2010, Rooper was cast in the musical Me and My Girl at Sheffield's Crucible Theatre, alongside Miriam Margolyes.
[3] Having been featured in films including The Railway Children, A Sound of Thunder, Kinky Boots, One Chance and The F Word (as the on-screen sister of Daniel Radcliffe's character) since 2003, she has since appeared in numerous guest roles on British series including Father Brown.
In September 2023, Rooper starred in the Channel 5 drama series The Inheritance, appearing alongside Samantha Bond, Rob James-Collier, Gaynor Faye and Adil Ray.