Harvey (1950) is a film starring Jimmy Stewart as Elwood P. Dowd. In the film, Dowd's best friend is a six-foot tall invisible rabbit named Harvey. Harvey is actually a pooka[?], a mischievous magical creature.
... diplomat, winner of the Nobel Peace Prize
April 16 - Fifi D'Orsay, actress (+ 1983)
April 22 - Robert Oppenheimer, physicist (+ 1967)
May 6 - Harry Martinson, ...