Clearly, these two working together results in movie magic.

De Niro shrugged, “It was always one film after another.”

Scorsese, meanwhile, noted plainly, “Nothing was ever planned or stated.”

Robert De Niro smiles at an event

“Raging Bull” came much earlier in the process, but it was no less of a commitment.

I thought I’d like to see if I could gain that weight."

This role ultimatelywon De Niro his second Oscar, for Best Actor.

Robert De Niro and Martin Scorsese pose together

He reportedly did 1,000 rounds with LaMotta, too.

The boxer even believed De Niro could’ve gone pro.