By Breaking Celebrity News Staff

He's set to tie the knot on Sunday, but Sir Paul McCartney and his bride-to-be appeared calm and collected as they dined out in London ahead of their wedding and Breaking Celebrity News has the photos.

The former Beatles rocker took Nancy Shevell and her son, Arlen, out for a meal at London's posh eatery Cecconi's.

The couple will reportedly say 'I do' on Sunday at The Old Marylebone Town Hall in London in front of 30 of their closest friends and family.