Clémence Poésy, the stage name of Clémence Guichard, is a French actress and model. She achieved international recognition for her portrayal of Fleur Delacour in the *Harry Potter* film series, beginning with *Harry Potter and the Goblet of Fire* (2005). Her career is distinguished by an effective balance between French-language and international productions. Her most notable English-language film roles include those in the critically acclaimed films *In Bruges* (2008) and *127 Hours* (2010), and in Christopher Nolan's science fiction thriller *Tenet* (2020). On television, she co-starred in the French-British series *The Tunnel* (2013-2018) and appeared in the BBC miniseries *War and Peace* (2016). In French cinema, she has distinguished herself in films such as *Le Grand Meaulnes* (2006), a role for which she won the Swann d'Or for Best Actress at the Cabourg Film Festival. Alongside her acting career, she has worked as a model, becoming one of the faces of the Chloé brand, and has made her directorial debut with several short films.