United Kingdom, Nov. 14 -- George Clooney's son dressed up as Batman for Halloween - oblivious to the fact that his dad once played the superhero.

The 64-year-old actor - who played the DC Comics character in the 1997 film Batman and Robin - likes it when his and 47-year-old wife Amal Clooney's eight-year-old twins Alexander and Ella do not know that their dad is an A-list celebrity.

The Jay Kelly star told US TV show Extra: "They don't understand it, which is fun, and I appreciate that they don't because it's more fun when they don't ... My son dressed up as Batman for Halloween, and I was like, 'You know I was Batman?' And he's like, 'Not really.'

"In fairness, he has no idea how right he is about that."

And Alexander likes laughing...