Hailee Steinfeld (born December 11, 1996) is an American actress. She rose to fame for her portrayal of Mattie Ross in the 2010 film True Grit, for which she was nominated for an Academy Award for Best Supporting Actress, a Screen Actors Guild Award for Outstanding Performance by a Female Actor in a Supporting Role and a BAFTA Award for Best Actress in a Leading Role.

She is also known for her portrayal of Petra Arkanian in the 2013 futuristic sci-fi film, Ender's Game. She played Juliet Capulet in the 2013 film adaptation of William Shakespeare's romantic tragedy, Romeo and Juliet, opposite Douglas Booth and Zoey in the 2014 crime film Three Days to Kill.