Ex-Beatle Paul McCartney ties the knot for the third time. Sir Paul married American heiress Nancy Shevell today at the very same London register office where he married his first wife Linda back in 1969. The 51-year-old Shevell wore a knee-length long-sleeved white dress. The 69-year-old McCarney was dressed in a dark suit and lilac tie. McCartney’s first marriage ended tragically when Linda McCartney died of cancer in 1998. In 2002, McCartney married former model Heather Mills. The couple divorced in 2008.