Margalit 'Maggie' Ruth Gyllenhaal (born November 16, 1977) is an American actress and filmmaker. Part of the Gyllenhaal family, she is the daughter of filmmakers Stephen Gyllenhaal and Naomi Achs, and the older sister of actor Jake Gyllenhaal. She began her career as a teenager with small roles in several of her father's films, and appeared with her brother in the cult favorite Donnie Darko (2001). She then appeared in Adaptation, Confessions of a Dangerous Mind (both 2002), and Mona Lisa Smile...