Robin Williams in the image of Marlon Brando and John Wayne 

Brando was in the 1953 film rendition of Julius Caesar in which he played Marc Antony.

Brando spoke like this in Julius Caesar. His speech style is funny, but he nails this scene that Williams is mocking, also the Dogs of War scene.

@@fernandomaron87 I didn't think Brando sounded _anything_ like Williams' imitation in Julius Caesar. The lines "friends, Romans, countrymen, lend me your ears!" were shouted in that scene, abruptly, to be heard over the noise of a crowd, not with the mumbly, Vito Corleone-style delivery Williams affects in this scene. The rest of that speech is delivered crisply and with a firm tone of voice appropriate to a man speaking to a crowd. In the Dogs of War scene, the words Brando doesn't shout are spoken through almost-gritted teeth, as befits a man enraged. No, I don't think Williams nailed Brando's interpretation of Shakespeare _at all._ He did Brando doing Vito Corleone reading Shakespeare, which, as the OP points out, is anachronistic -- he certainly doesn't sound to me like Brando in The Wild One, or A Streetcar Named Desire, or On the Waterfront, or any of the other 1950s movies of Brando's. It sounds like The Godfather, where Brando was affected that soft, almost mumbling speech because he was playing an elderly character about twenty years older than his actual age.