Paul McCartney is 69 years old (birthdate: June 18, 1942).
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His adopted daughter Heather (who is his daughter, just not biologically) is 48, his first-born Mary is 42, Stella is 40, James is 34 and Beatrice is 8.
He has three daughters, Mary, Stella, and now Beatrice. Mary is the eldest and Beatrice is (by far) the youngest. He also has a stepdaughter named Heather.
McCartney was 15 in 1957 when he joined "The Qarrymen" with John Lennon, George Harrison, and Stuart Sutcliff.Three years later the band's name was changed to "The Beatles"