London, May 7 : Beatles legend Paul McCartney has got engaged to his girlfriend Nancy Shevell, after four years of being together.

McCartney, 68, started dating the 51-year-old New York businesswoman in the summer of 2007, and despite the 17-year-age difference, friends have described the pair as the "perfect couple".

"They have the right chemistry," the Daily Mail quoted a source as telling People magazine.

Stella McCartney, the Beatle legend's daughter from his first marriage to Linda, is also said to be "absolutely thrilled" for her father.

However, McCartney's spokesman, Stuart Bell, has refused to confirm the news.

"We don't comment on this kind of thing," Bell added.(ANI)