Orson Welles was a producer.
Citizen Kane is a 1941 American mystery drama film by Orson Welles , its producer , co-screenwriter , director and star . Orson Welles . He is remembered for his innovative work in all three : in theatre , most notably Caesar ( 1937 ) , a Broadway adaptation of William Shakespeare 's Julius Caesar ; in radio , the legendary 1938 broadcast `` The War of the Worlds '' ; and in film , Citizen Kane ( 1941 ) , consistently ranked as one of the all-time greatest films .