The Lost Daughter is a 2021 psychological drama film written and directed by Maggie Gyllenhaal (in her feature directorial debut), based on the 2006 novel of the same name by Elena Ferrante. The film stars Olivia Colman, Dakota Johnson, Jessie Buckley, Paul Mescal, Dagmara Domińczyk, Jack Farthing, Oliver Jackson-Cohen, Peter Sarsgaard, and Ed Harris. Colman also served as an executive producer.