Clémence Poésy (born October 1982 as Clémence Guichard) is a French actress and fashion model. After starting on the stage as a child, Poésy had dramatic education, and has been active in both film and television since 1999, including some English-language productions.

She is known for the roles of Fleur Delacour in the Harry Potter film series, Chloë in In Bruges, and Rana in 127 Hours. She is also known for her small role as Eva Coupeau on Gossip Girl.