Sir James Paul McCartney, a former member of The Beatles, will marry U.S. heiress Nancy Shevell, at a register's office in London, on Sunday, according to reports in both The Daily Mirror and The Sun.

Both tabloids, in reports on Saturday, said that McCartney, 69, and Shevell, 51, will tie the knot in front of 30 invited guests.

This is McCartney's third wedding and, interestingly, he will marry Shevell at the same venue where he married his first wife, Linda McCartney (who died of breast cancer in 1998), at the height of The Beatles' fame.

The couple has been given special privilege by the council to marry on Sunday and have chosen what would have been the groom's former band mate, John Lennon's, 71st birthday for their big day, the Daily Mirror reported.

The wedding reception will be held at McCartney’s home in nearby St John’s Wood.

The Daily Mirror quoted a source close to McCartney as saying: The wedding is in keeping with the way Paul and Nancy have conducted their entire relationship -- low-key, understated and fueled by goodwill.”

Neither of them want a huge fuss made and the main priority for both was family, the source added.

Shevell and McCartney have been dating for four years now, following the latter's divorce from his second wife, former model Heather Mills, in 2008. McCartney and Mills were married at Castle Leslie in Ireland.

McCartney has a son, two daughters and a stepdaughter from his marriage to Linda and a daughter from his union with Mills.