The Beatle and his girlfriend , a New York businesswoman , tied the knot at London's Old Marylebone Town Hall in front of 30 guests , including Ringo Starr and Barbara Walters, who's related to Shevell.
McCartney sported a blue suit , and the bride wore a long-sleeved white gown with a white flower in her hair. Both outfits were designed by the singer's designer daughter Stella McCartney.
The 7-year old Beatrice served as flower girl.
At the non-denominational ceremony , McCartney gave Shevell a 5-carat diamond wedding band .
The newlyweds posed for photos after the wedding , where they was showered with confetti by guests.
"It was terrific," McCartney told the assembled crowd , jokingly adding that now he felt "married."
A wedding reception is now taking place at McCartney's home in London.
The couple got engaged in May.
McCartney was previouslt married to the late Linda McCartney and Heather Mills , whom he officially divorced in 2008.
This is Sevell's second marriage.
Interestingly , McMartney wed on what would have been bandmate John Lennon's 71st birthday.
Congradulations to Paul & Nancy ! May you have many years of great happiness .
