Daughter of Mary Forbes.
She was nominated for a 1975 Joseph Jefferson Award for Best Actress in a Principal Role for her performance in "The Sea" at the Goodman Theatre in Chicago, Illinois.
Sister Ralph Forbes.
Sister-in-law to 1920s/1930s actress, Ruth Chatterton, when Forbes' brother, Ralph Forbes, married the actress.
Was nominated for Broadway's 1967 Tony Award as Best Supporting or Featured Actress (Dramatic) in "The Loves of Cass McGuire."