Himself - at Potsdam (archive footage) (uncredited)
June Foray
Cindy Lou Who
Rudolf Hess
Himself - with Hitler in Nuremberg (archive footage) (uncredited)
Adolf Hitler
Himself (archive footage) (uncredited)
Bob Holt
Lorax
Boris Karloff
The Grinch
William D. Leahy
Himself - at Potsdam (archive footage) (uncredited)
Vyacheslav Molotov
Himself - at Potsdam (archive footage) (uncredited)
Dr. Seuss
Himself (archive footage) (uncredited)
Joseph Stalin
Himself - at Potsdam (archive footage) (uncredited)
Julius Streicher
Himself - with Hitler in Nuremberg (archive footage) (uncredited)
Did you know?
Trivia
Zelda Williams is Robin William's real life daughter who portrays his daughter in this movie. While Eleanor Columbus who portrayed the other daughter was Chris Columbus's daughter.