Hugh Jackman Boo'd at "X-Men Origins: Wolverine" Screening

Hugh Jackman showed up at a midnight showing of his new film X-Men Origins: Wolverine in the U.S. on Thursday night - and was booed by film fans.

The actor slipped in to a city cinema and decided to surprise the audience just before the film started.

He explains, "We ran the trailers as normal and then all of a sudden the lights went up and they were like, 'Boo.'

"I said, 'Sorry, there's been a technical problem...' and they're like, 'Wolverine!'"

The booing was then replaced by cheering. The film is expected to race to top of the box office this weekend.