Madonna at fantasy movie premiere

Madonna attended with husband Guy and children Rocco and Lourdes

Madonna attended the premiere of her new film, Arthur and the Invisibles, in London's Leicester Square.

She was accompanied by her husband Guy Ritchie and children Lourdes and Rocco. Recently adopted David Banda was said to be at home sleeping.

Madonna provides the voice for one of the characters in the part-animated children's fantasy.

Director Luc Besson said it was his last film: "I've been in this business for 30 years. It's a long time."

Madonna, 48, voices the character of Princess Selenia in the new film.

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She said: "It was great fun. I got to voice the character while sitting there in my tracksuit."

Asked what attracted her most to the character, she answered: "I like how tough she is and that she knows how to use a sword."

French director Besson joked about the UK's celebrity scene: "You don't have [David] Beckham any more. You exchanged him for Madonna and you won, although she doesn't play football."

Other arrivals last night included TV presenters Vanessa Feltz and Melinda Messenger.