Sir Paul McCartney found writing a song for Robert De Niro's new movie EVERYBODY'S FINE a therapeutic experience, but the storyline mimicked aspects of his own life.
De Niro plays a widower attempting to reconnect with his offspring at Christmas time.
The former Beatle, who lost his first wife Linda in 1998, tells Daily Variety, "It's not necessary for me to relate to a project that I'm writing about, but if I do, it's more interesting.
"The De Niro character lost his wife, has grown-up children and wants to get them together for Christmas. I know that syndrome."