Guillaume Canet (born 10 April 1973) is a French actor and film director.

Canet began his career in theatre and television before moving to film. He starred in several films like Joyeux Noël, Love Me If You Dare and The Beach. In 2006, he turned to writing and directing with Tell No One and won a César Award for Best Director.

Canet has also received attention because of his personal life. He was formerly married to actress Diane Kruger. After they divorced he began a relationship with Marion Cotillard that was closely followed by the media.