Margalit Ruth "Maggie" Gyllenhaal 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 thriller Donnie Darko (2001). She then appeared in Adaptation, Confessions of a Dangerous Mind (both 2002), and Mona Lisa Smile (2003). Gyllenhaal received praise for her leading performances in the dramas Secretary (2002) and Sherrybaby (2006), each of which earned her a Golden Globe Award nomination. She had commercial success in the thriller World Trade Center (2006), and received wider recognition for playing Rachel Dawes in the superhero film The Dark Knight (2008).
For her performance as a single mother in Crazy Heart (2009), she received a nomination for the Academy Award for Best Supporting Actress. She subsequently starred in the films Nanny McPhee and the Big Bang (2010), Hysteria (2011), Won't Back Down (2012), White House Down (2013), Frank (2014), and The Kindergarten Teacher (2018).