In what movie does Charlie Chaplin play both Adenoid Hynkel and lookalike barber?

The movie where Charlie Chaplin plays both Adenoid Hynkel and a lookalike barber is The Great Dictator.

In the film, Chaplin plays both the dictator Hynkel, a parody of Adolf Hitler, and a Jewish barber who is mistaken for Hynkel after being imprisoned in a concentration camp. The film uses Chaplin's dual roles to highlight the absurdity of Nazi ideology and the dangers of unchecked power.