The three young royals, the Duke and Duchess of Cambridge, aka William and Kate, along with William's brother Prince Harry visited Warner Bros studios in Leavesden on Friday.

For once, it was a chance to let their hair down on a royal visit with William assuming the role of Batman by mounting the Batpod. It seemed that William outed himself as a huge fan of the Dark Knight series directed by Christopher Nolan, taking great pleasure in playing around with the special effects and also making a plea to Warner Bros with this speech.

And he got further into the movie making spirit with the use of a clapper board....

After the speeches, it was time for the trio to enter Harry Potter's world - more specifically the Great Hall of Hogwarts. And while Harry checked out the detailed sets, William and Kate were given a lesson in fighting with the franchise's magic wands. But if the pair were to meet in a clash of spells, who would be the winner?