Michael Keaton’s career has been filled with blockbusters and award-winning films; if he hadn’t slowed down to be a family man, it may have had some more financial hits as well.

“I could have made a lot more money,” laughs the 73-year-old Beetlejuice actor, who claims he got the nickname “Dr. No” by rejecting down opportunities.

The Batman actor refused to reveal the specific titles he passed up in order to spend more time with his son, Sean Douglas, 41, and, more recently, his grandchildren, River, 7, and Maggie, 5. Keaton was born Michael Douglas, and Keaton is his professional name.

However, choosing family above business has always been a “no brainer” for the Oscar-nominated Birdman actor. “That’s only going to happen once—he’s only going to be a kid [for a bit],” he jokes.

“You look back and say, ‘Zero regret.'” “Zero, zero,” says Keaton. “That’s not to suggest that I’ll see a movie that I didn’t make and go, ‘Oh, boy. It turned out to be a decent film. However, the option was always the correct one. “I always wanted to be a father.”

Keaton and his then-wife, actress Caroline McWilliams (who died of cancer in 2010, decades after their divorce), welcomed Sean in 1983. He says he and McWilliams fought hard to keep Sean grounded, but their kid didn’t require much assistance.

“I am going to claim credit for being a decent father. I’ll give his mother a lot of credit for being an excellent mother. “What a wonderful mother,” he says. “And that’s why he’s a good kid.”

“But do you know what that is?” That’s him. I believe that some people have a unique quality. Parenting is undeniably vital, if not essential. However, there is something special about certain people. So, I give him the remainder of the credit. His construction has always been consistent.” He is a sweet and thoughtful guy.”

These days, Keaton still takes time to spend with Douglas, a Grammy-winning musician, his son’s wife, Rachel Bartov, and their two children.

“I started going, ‘I’m not hanging out with him, his kids, and Rachel quite enough,'” said Keaton. “And we see each other a lot.”

Keaton is incredibly proud of his kid, who has collaborated with everyone from Madonna to Meghan Trainor.

“He is all over, guy. He writes hip-hop. He writes about his country. He writes everything. And the nicest part about his gift is that it is melodic, entertaining, and he has an incredible ear,” says Keaton.

“But if you really listen lyrically, like going back to the old classic guys from the ’30s and ’40s, those classic songwriters, there was always an element of irony, or funny, or clever.” And that’s what I appreciate most about his work. He emphasizes the importance of paying close attention to the lyrics.

“When I first heard one of his songs, he was already an adult,” Keaton used to say. “I said, ‘You can’t say those things. Sean, what is the matter with you? Where did you learn this language? When I heard it, I said, ‘But that’s so frigging trendy.'”

Beetlejuice Beetlejuice arrives in cinemas on Friday, September 6.