Harry Potter star Daniel Radcliffe fooled fans at Comic-Con in San Diego, California on Friday (25Jul14) by hitting the convention floor dressed up as Spider-Man.

The young Brit was forced to delay his arrival at the event due to a visa issue which left him stranded in Canada, where he was promoting his new movie What If on Thursday (24Jul14), but he eventually made it to Comic-Con and decided to have some fun by posing with fans in disguise.

A reporter for MTV posted a photo of Radcliffe putting his Spider-Man mask on right before he donned the full costume.

An insider tells Wenn, "He was the quietest Spidey ever because he felt sure that if he spoke, the superfans at Comic-Con would recognise the voice and rumble him."