The stunning blonde is 27, yet she still gets jobs playing teenagers.
The US actress, who broke out as snarky high school cheerleader Quinn Fabray in the hit TV series Glee, played a student in 2011's I Am Number Four and is doing so again in her latest flick, We're A Nice Normal Family.
Opening here today, the action comedy sees Agron playing Belle, the teen daughter of a mafia family - Hollywood veterans Robert De Niro and Michelle Pfeiffer play her parents - that has been relocated to the rural French area of Normandy while under witness protection.
Belle may look all pretty and innocent, but she has a brutal streak and has no qualms re-arranging her classmate's face just for taking her pencil case.
Can you tell us more about your character Belle?
She's a typical teenager in the sense that she wants to fall in love and discover herself.
She's very mature, steadfast, observant at times and yet can be a daydreamer at other moments. On the other hand, she's also not your average teen, having grown up in a family where violence is prevalent.
She's loves her parents, but she's very much a daddy's girl and is very proud of her father. There's a moment when he expresses that he's sorry for the way things have turned out, and she refuses that because for her, he's everything.