Sir Paul McCartney has confirmed he will end the opening ceremony of the London Olympic Games on July 27.

Speaking on BBC Radio 5 Live he said "I've been booked," and added that he would be "closing the opening".

A total cast of 15,000 will take part in the Olympic and Paralympic opening and closing ceremonies, to be watched by an estimated four billion people worldwide.

The full line-up of the opening ceremony is yet to be announced.

A performance by the former Beatle has long been rumoured, and in January he disclosed he was in talks about taking part.