Dustin Hoffman as Georgie Soloway

Barbara Harris as Allison Densmore

Jack Warden as Dr. Solomon F. Moses

David Burns as Leon Soloway

Gabriel Dell as Sidney Gill

Betty Walker as Margot Soloway

Rose Gregorio as Gloria Soloway

Dom DeLuise as Irwin Marcy

Regina Baff as Ruthie Tresh

David Galef as Leonard Soloway

Ed Zimmermann as Peter Halloran

Amy Levitt as Susan

Joseph R. Sicari as Marty (as Joe Sicari)

Rudy Bond as Newsdealer

Walter Hyman as Flower Vendor

Josip Elic as Chomsky

Herbie Faye as Divorcee

James Hall as Lemuel

Sherry Rooney as Marilyn

Robyn Millan as Samantha

Walter Hyman Jr. as Danny Charleston

Shel Silverstein as Bernie

Irwin Rose as Photographer

Candice Azzara as Sally (as Candy Azzara)

Marty Greene as Uncle Louis (as Martin Greene)

Sidney Armus as Marvin

Susan Bell as Sky Phone Operator

Steve Eppolito as Dustin as a Boy