Dianne Wiest (born March 28, 1948) is an American actress. She has enjoyed a successful career on stage, television, and film, and has won two Academy Awards, two Emmy Awards and a Golden Globe Award. Wiest has also been nominated for the BAFTA award.
In 1976, Wiest went to the Eugene O'Neill National Playwrights Conference and played leading roles in Amlin Gray's Pirates and Christopher Durang's A History of the American Film. At Joe Papp's Public Theatre she took over the lead in Ashes, and played Cassandra in Agamemnon, directed by Andrei Şerban. She appeared in two plays by Tina Howe, Museum and the The Art of Dining. In the latter, Wiest's role as the shy and awkward authoress Elizabeth Barrow Colt won every off-Broadway theatre award for her performance: an Obie Award, a Theatre World Award, and the Clarence Derwent Award, given yearly for the most promising performance in New York theatre. In early 1980, she appeared on Broadway in Frankenstein, directed by Tom Moore, portrayed Desdemona in Othello opposite James Earl Jones and Christopher Plummer, and co-starred with John Lithgow in Christopher Durang's romantic screwball comedy Beyond Therapy, directed by John Madden. (A few years later she played opposite Lithgow again in the Herbert Ross film Footloose). Also in the 80s she was acclaimed for her performances in Hedda Gabler, directed by Lloyd Richards at Yale Repertory Theatre, and in Harold Pinter's A Kind of Alaska, Janusz Glowacki's Hunting Cockroaches, and Lanford Wilson's Serenading Louie. She is currently playing Arkadina in The Seagull in a Broadway production opposite Alan Cumming.
Under Allen's direction, Wiest won an Academy Award for Best Supporting Actress for Hannah and Her Sisters (1986). She followed her Academy Award success with performances in The Lost Boys (1987) and Bright Lights, Big City (1988) before starring with Steve Martin, Mary Steenburgen, Jason Robards, Keanu Reeves and Martha Plimpton in Ron Howard's Parenthood, for which she received her second Oscar nomination.
In 1990, Wiest starred in Edward Scissorhands. She returned to Woody Allen in 1994 for Bullets Over Broadway, a comedy set in 1920s New York City, winning her second Best Supporting Actress Oscar for her portrayal of Helen Sinclair, a boozy, glamorous, and neurotic star of the stage. She appeared in the films The Birdcage (1996) and Practical Magic (1998) and the television mini-series The 10th Kingdom (2000). From 2000 to 2002, Wiest portrayed interim District Attorney Nora Lewin in the long-running NBC crime drama Law & Order.
2007 saw Wiest starring alongside Steve Carrell in Dan In Real Life and also the television series In Treatment. For the latter, it was announced on 17 July 2008 that Wiest had received an Emmy nomination (her third overall) as Outstanding Supporting Actress in a Drama Series. She received the Emmy for her role in the HBO Original Series In Treatment 21 September 2008.
She was in a long term relationship with Hollywood agent, Samuel Cohn for many years.