They were married for nearly 30 years, and had one of the strongest unions in showbusiness.
And now Sir Paul McCartney has come up with a fitting tribute to his beloved late wife Linda, who was an accomplished photographer.
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Along with two of their children, fashion designer Stella and Mary, also a photographer, the former Beatle has published a book of her portraits.
Taken from an archive of 200,000, A Life in Photographs, charts her career capturing the biggest rock stars of the Sixties and Seventies.
Paul is now happily involved with businesswoman Nancy Shevell. But he has never forgotten the love he felt for Linda, who died of breast cancer in 1998.
He said: "From the early days I have very much admired her photography and being able to experience it personally only added to my feelings of admiration.
"In those days, it was quite unusual for a woman photographer to be working on her own in photography.
"In many ways, I know she has inspired a large number of female photographers who followed in her footsteps."
One of the book's co-authors, photographer Annie Leibovitz, said: "Her pictures are proof of a life well lived. As a woman and as an artist.
"Linda McCartney's life became one with her photography. This was more obvious later on, but in a way it was true from the beginning.
"Linda never stopped taking pictures. She was serious about it".
It's a little princess!