Stella McCartney didn't know her father was a Beatle when she was a child.

Sir Paul McCartney - who raised his children, Mary, 38, Stella, 36, and James, 30, and stepdaughter Heather, 44, with late wife Linda on a remote Scottish farm - has revealed he never told his kids he was a world famous musician.

He said, "There was this one moment where they were riding their little ponies in Scotland, and Stella said to me 'Dad, you're Paul McCartney, aren't you?' and I said, 'Yes darling, but I'm daddy really.'"

The 65-year-old musician also revealed all his children - including four-year-old Beatrice from his failed marriage to Heather Mills - performed a version of The Beatles classic 'When I'm 64' when he reached the landmark age last year.

He said, "I planned to try and ignore turning 64, but on the morning of my birthday my kids did a version for me. I even had the baby doing it! It was great."

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