Rosemary Ann Harris is an English actress. She is the recipient of such accolades as a Emmy Award, a Golden Globe Award, and a Tony Award as well as nominations for an Academy Award, a BAFTA Award, and three Laurence Olivier Awards. Harris was inducted into the American Theater Hall of Fame in 1986, and she won the Tony Award for Lifetime Achievement in the Theatre in 2017.

The Tony Award for Best Performance by a Leading Actress in a Play is presented by the American Theatre Wing and The Broadway League at an annual ceremony in Manhattan. The award is given to actresses for quality leading roles in a Broadway play. Despite the award first being presented in 1947, there were no nominees announced until 1956. There have been two ties in this category, and one three-way tie.