Hailee Steinfeld was born on December 11, 1996 in the Tarzana neighborhood of Los Angeles, California, the daughter of Cheri (née Domasin), an interior designer, and Peter Steinfeld, a personal fitness trainer. She has an older brother, Griffin. Her paternal uncle is fitness trainer Jake Steinfeld, and her maternal grand-uncle is former child actor Larry Domasin. Her maternal first cousin, actress True O'Brien, appeared in a television commercial when Steinfeld was eight years old, inspiring her to try acting as well. Steinfeld's father is Jewish.Her maternal grandfather was of half Filipino and half African-American descent. She was raised in Agoura Hills and later in Thousand Oaks, California, attending Ascension Lutheran School, Conejo Elementary, and Colina Middle School. She was home-schooled from 2008 until her high school graduation in June 2015. Steinfeld began acting at the age of ten; she appeared in several short films, including in the role of Talia Alden in the award-winning She's a Fox. She made several television guest appearances and commercials. Steinfeld was chosen for the role of Mattie Ross in True Grit when she was 13. The film was released internationally in December, 2010; Richard Corliss of Time magazine called her performance one of the Top 10 Movie Performances of 2010 and wrote that Steinfeld "delivers the orotund dialogue as if it were the easiest vernacular, stares down bad guys, wins hearts. That's a true gift". Reviews from Roger Ebert, the Los Angeles Times, and Rolling Stone were also complimentary.

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