Robin Williams as T.S. Garp

Mary Beth Hurt as Helen Holm

Glenn Close as Jenny Fields

John Lithgow as Roberta Muldoon

Hume Cronyn as Mr. Fields

Jessica Tandy as Mrs. Fields

Swoosie Kurtz as The Hooker

Brenda Currin as Pooh

Peter Michael Goetz as John Wolfe

Jenny Wright as Cushie

John Irving as Referee

Amanda Plummer as Ellen James

Bette Henritze as Woman Candidate

Katherine Borowitz as Rachel

Kate McGregor-Stewart as Real Estate Lady

Mark Soper as Michael Milton

Warren Berlinger as Stew Percy

Brandon Maggart as Ernie Holm

Victor Magnotta as First Coach

Al Cerullo as Helicopter Pilot

Ron Frazier as Stephen

Eve Gordon as Marge Tallworth

George Roy Hill as Pilot (uncredited)