Holy Royals, Batman!

William Rides The Bat Bike!

William had a blast today when he got up on the Bat Bike while experiencing the new tour at Warner Bros's UK studios.

Kate looked on giggling dutifully.

William, a keen Ducati rider, turned to Harry and whispered: 'We should borrow that for the weekend.'

Well, if you're going to have a pre-kid quarter-life crisis, it beats a Harley.

William joked about taking over the Batman role with Josh Berger, president and managing director of Warner Brothers UK, Ireland and Spain, telling him: “Christian Bale’s getting old and tired ... I will stand in if I have to.”

The Duke, who is president of Bafta, said in a speech: “I’m over the moon just to have seen the real Batmobile and Batpod... you don’t do baby seats for those cars, do you, by any chance?

“On the other hand, Harry’s just excited to see a real-life talking owl in the Harry Potter studios. I haven’t told him yet that Harry Potter is fictional, so please keep the secret for a little longer.”