Michael-Keaton-River-Keaton-Tout

Michael Keatonis seeing his role as Batman in a whole new light, thanks to his grandson.After a special early screening of the superhero movie atCinemaCon 2023in Las Vegas on Tuesday, director Andy Muschietti toldIGNthat the actor, 71, was overcome as he stepped into the Batcave on the film’s set,reprising his role for the first time since1992’sBatman Returns.“When [Keaton] arrived to the set, the Batcave was already finished and it was lit and everything. He stayed like this [eyes wide] for a while. I didn’t want to interrupt him,” the directortold the outlet. “I just wanted for him to take it in. Who knows what was going on there? But something was going on there.“Muschietti continued, “It was funny because at one point during the scene where we shot him in the full suit, he was like, ‘Can you take a picture? It’s for my grandson.’ It was one of those moments where he really showed something was inside that was very emotional.“Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.Sunset Boulevard/Corbis via GettyKeaton is dad to songwriter Sean Douglas, who is a dad himself to daughter Maggie, 2½, and son River, 6. Douglas, 39, shares his two kids with wife Rachel Bartov.Memorably, Keaton tearfully shouted out his son during his 2015 Golden Globe Award win for his performance inBirdman.“My best friend is kind, intelligent, funny, talented, considerate, thoughtful,” he said in his acceptance speech. “Did I say kind? He also… He also happens to be my son, Sean.“The Flashzooms into theaters June 16.

Michael Keatonis seeing his role as Batman in a whole new light, thanks to his grandson.

After a special early screening of the superhero movie atCinemaCon 2023in Las Vegas on Tuesday, director Andy Muschietti toldIGNthat the actor, 71, was overcome as he stepped into the Batcave on the film’s set,reprising his role for the first time since1992’sBatman Returns.

“When [Keaton] arrived to the set, the Batcave was already finished and it was lit and everything. He stayed like this [eyes wide] for a while. I didn’t want to interrupt him,” the directortold the outlet. “I just wanted for him to take it in. Who knows what was going on there? But something was going on there.”

Muschietti continued, “It was funny because at one point during the scene where we shot him in the full suit, he was like, ‘Can you take a picture? It’s for my grandson.’ It was one of those moments where he really showed something was inside that was very emotional.”

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

Sunset Boulevard/Corbis via Getty

Michael Keaton in Batman

Keaton is dad to songwriter Sean Douglas, who is a dad himself to daughter Maggie, 2½, and son River, 6. Douglas, 39, shares his two kids with wife Rachel Bartov.

Memorably, Keaton tearfully shouted out his son during his 2015 Golden Globe Award win for his performance inBirdman.

“My best friend is kind, intelligent, funny, talented, considerate, thoughtful,” he said in his acceptance speech. “Did I say kind? He also… He also happens to be my son, Sean.”

The Flashzooms into theaters June 16.

source: people.com