I echo the sentiment that the preformance was so strong by Marlon Brando that he literally embodied MP's character and maybe even made a few improvements along the way.

But, it's funny we sit here discussing this, but I'm sure if Danny Thomas or Anthony Quinn were picked for the role and they did a great job and someone commented "Hey, what happened to Marlon Brando, I wonder how he would do in that role, I heard FFC was interviewing him in pre-production". The ineveitable response would have been "Ya, right Marlon Brando. Give me a break. 'Stella! Stella!', I guess he would have been alright but he would be no Anthony Quinn".

I heard Robert Deniro read for GF I, what role did he read for? Does anybody know?