Leo and Brad attended the premiere with castmate Margot Robbie and the film's director, Quentin Tarantino.
Brad shocked fans himself after speaking out about his future plans for his acting career.
“No, I don’t know. I don’t know. I enjoy doing other things,” Brad, 55, told People when asked whether he’s thought about leaving his acting career behind.
Before adding: “I think that one day I’ll just wake up and organically it’ll be done. Maybe I won’t wake up and that’s why it’ll be done.”
Speaking to GQ Australia earlier this month, Brad also spoke out about his admiration for Leo.
"We kind of popped at the same time," he told the publication.
"This is a guy who's really giving and really goes for it, so you know it's great fun being able to spar with that caliber of actor. And he's just great fun," he said.