She became known as Fleur Delacour in the Harry Potter films. She also starred as Chloe in In Bruges and played Rana in 127 Hours.
She received her first acting job from her father when she was fourteen.
She played Eva Coupeau on Gossip Girl in 2010.
She grew up in Paris as the daughter of Étienne Guichard, an actor and a writer. She became engaged to actor Emeric Glayse.
She starred Mr. Morgan's Last Love alongside Michael Caine.