Margalit Ruth Gyllenhaal, known professionally as Maggie Gyllenhaal, is an accomplished American actress and filmmaker recognized for her diverse roles in both film and television. Born on November 16, 1977, in the Lower East Side of New York City, she comes from a creative family; her father, Stephen Gyllenhaal, and mother, Naomi Foner, are both filmmakers, and her younger brother is acclaimed actor Jake Gyllenhaal. Maggie’s upbringing in an artistic environment fostered her passion for performance, leading her to begin her career as a teenager with small roles in her father's films.

Gyllenhaal gained significant attention in the early 2000s, particularly for her role as Donnie’s sister in the cult classic thriller Donnie Darko (2001). Her career blossomed with notable performances in films such as Secretary (2002), where she portrayed Lee Holloway, a role that would become a defining moment in her career, earning her widespread acclaim and a Golden Globe nomination. She continued to build her filmography with compelling roles in Adaptation and Confessions of a Dangerous Mind, both released in 2002, followed by Mona Lisa Smile (2003), showcasing her range and versatility as an actress.

Throughout her career, Gyllenhaal has delivered powerful performances across various genres. She received critical praise for her role in Sherrybaby (2006), which further solidified her reputation as a serious actress. The same year, she appeared in the disaster drama World Trade Center, achieving commercial success. Her portrayal of Rachel Dawes in the superhero blockbuster The Dark Knight (2008) garnered her wider recognition, and she continued to receive accolades, including an Academy Award nomination for Best Supporting Actress for her role in Crazy Heart (2009).

Gyllenhaal's filmography also includes a variety of projects such as Nanny McPhee and the Big Bang (2010), Hysteria (2011), and Frank (2014). In addition to her film work, she has made significant contributions to television, starring in the critically acclaimed BBC miniseries The Honourable Woman (2014), for which she won a Golden Globe Award for Best Actress and received a Primetime Emmy nomination. Furthermore, Gyllenhaal produced and starred in the HBO series The Deuce (2017–2019), which explored the rise of the porn industry in New York City.

In 2021, Gyllenhaal made her debut as a writer and director with the psychological drama The Lost Daughter. The film, which received critical acclaim, earned her an Academy Award nomination for Best Adapted Screenplay and won the Venice Film Festival Award for Best Screenplay, marking a significant milestone in her evolving career as a filmmaker.

Maggie Gyllenhaal's dedication to her craft and her ability to tackle complex characters have established her as a significant figure in contemporary cinema. She continues to be a prominent force in the entertainment industry, bringing her unique perspective and talent to each new project. She is married to fellow actor Peter Sarsgaard, with whom she shares two children.