The deafening screams in London's Leicester Square are usually down to Robert Pattinson or Zac Efron, but on Thursday night it was nothing to do with the tween stars, the squeals of delight were all for Leonardo DiCaprio.

The US actor sent fans into a frenzy as he signed autographs and took pictures at the premiere of Inception. A couple of youngsters who met the heartthrob were even reduced to tears.

Explaining what he made of the reception, DiCaprio said: "It's great. It's great to show this movie to the world especially here in London."

Inception is a mind bending thriller from writer and director Christopher Nolan. It follows a group who steal top secret information from people's dreams.

"We really worked hard on it, six different locations around the world, a lot of thought has gone into it. I think it lives up to the hype," said DiCaprio, 35.

He stars alongside Sir Michael Caine, Marion Cotillard, Joseph Gordon-Levitt, Tom Hardy, Ken Watanabe and Ellen Page, who admitted she had a crush on DiCaprio while growing up.

"I may have had a picture at one point in my locker, but do not tell him," she said.