The American Repertory Theater (A.R.T.) is a professional not-for-profit theater in Cambridge, Massachusetts. Founded in 1979 by Robert Brustein, the A.R.T. is known for its commitment to new American plays and music–theater explorations; to neglected works of the past; and to established classical texts reinterpreted in refreshing new ways. Over the past forty years it has garnered many of the nation's most distinguished awards, including a Pulitzer Prize (1982), a Tony Award (1986), and a Jujamcyn Award (1985). In 2002, the A.R.T. was the recipient of the National Theatre Conference's Outstanding Achievement Award, and it was named one of the top three theaters in the country by Time magazine in 2003. The A.R.T. is housed in the Loeb Drama Center at Harvard University, a building it shares with the Harvard-Radcliffe Dramatic Club. The A.R.T. operates the Institute for Advanced Theater Training.

Robert Sanford Brustein was an American theatrical critic, producer, playwright, writer, and educator. He founded the Yale Repertory Theatre while serving as dean of the Yale School of Drama in New Haven, Connecticut, as well as the American Repertory Theater and Institute for Advanced Theater Training at Harvard University in Cambridge, Massachusetts, where he was a creative consultant until his death, and was the theatre critic for The New Republic. He commented on politics for the HuffPost.