Agathe Bonitzer is the daughter of the director and screenwriter Pascal Bonitzer and the director Sophie Fillières. Agathe Bonitzer decided about 12-13 years to become an actress and to follow two years of theater studies at the Conservatoire Erik-Satie of the 7th arrondissement of Paris (with Daniel Berlioux). She also studied modern litterature.
She made her first steps in cinema in 1996, in Raoul Ruiz's movie Three Lives and a Single Death. After playing the daughter of Daniel Auteuil, Jean-Pierre Bacri or Édouard Baer in some movies, her real father offers her a first important role in 2008 in The Great Alibi. The she played in Christophe Honoré movie, with Louis Garrel in The Beautiful Person who revealed her to the general public.
In 2009, she got the second part of A cat a cat and played with Chiara Mastroianni. The same year, Jacques Doillon chosed her to play the lover of Pascal Greggory in The three-way wedding. She plays in the new film of Ado Arrieta, Sleeping Beauty, which premiere this year at Entrevues.