It's almost impossible to imagine a world in which Al Pacino didn't play Michael Corleone in 1972's The Godfather.
However, Diane Keaton says that producers almost went a different direction -- until she was cast in the film.
Keaton recently spoke with ET's Nischelle Turner, while discussing her new film Mack & Rita, and she reflected on her iconic career filled with beloved and uniquely quirky characters.
I auditioned for The Godfather having never read it and I knew nothing about it, and just was there, I was standing there like every other woman," she remembered.
They didn't want him to play that part, and I had already been cast," Keaton recalled.
"So I was standing there and they brought him up when I was standing there and we worked together in front of [the producers], and they gave him the job," she continued.
What would The Godfather have been without Al Pacino?" she added. "It's just one of those weird, unusual things in life.