George Clooney says there aren't "enough drugs in the world" to get him to reprise his role as Batman.
The Oscar-winning actor, 62, was savaged by critics for his portrayal of the vigilante in 1997's Batman and Robin movie alongside Arnold Schwarzenegger and Uma Thurman.
He did return to the role earlier this year when he made a cameo in The Flash, with Michael Keaton, 72, who played the comic book hero in Tim Burton's Batman in 1989, also featured in the June movie.
But he told Entertainment Weekly about the chance of him taking a full feature role as Batman in the future: "I don't think there are enough drugs in the world for me to go back again."
George wanted to sport the same suit he wore before as Batman for his turn as the crimefighter in The Flash, with his look infamous for its rubber nipples.
He added: "They were like, 'Can we do it without the rubber nipples? I was like, 'Well, it's not really my Batman, is it?'"
George has previously made fun of his turn as Batman, telling Deadline in 2013 that it acts as "a cautionary reminder of what can happen when you make movies solely for commercial reasons".
He also admitted on the Hollywood Reporter's Awards Chatter podcast six years later that'Batman and Robin was "not a good film", before branding it a "failure" in 2019 and said it taught him a lesson.
He said: "I had to rethink how I was working [after that]. Because now I wasn't just an actor getting a role, I was being held responsible for the film itself."
Robert Pattinson, 37, most recently played the superhero, in The Batman alongside Zoë Kravitz, 35, as Catwoman.
The Twilight actor wore George's Batsuit during his screen test and snuck a selfie before taking off the costume.