Marie-Castille Mention-Schaar (born January 26, 1963) is a French film director, producer and screenwriter. She is most noted for her 2016 film Heaven Will Wait (Le Ciel attendra), for which she was a nominee for the Lumières Award for Best Screenplay at the 22nd Lumières Awards.

Her newest film, A Good Man, was named as an Official Selection of the 2020 Cannes Film Festival.