Paul McCartney woke up to the start of his third marriage today after tying the knot with American heiress Nancy Shevell.
The 69-year-old former Beatle said he felt "absolutely wonderful" after yesterday's wedding at The Old Marylebone Town Hall in central London.
Last night family and friends from the world of showbusiness were among the guests at the reception at Paul's north London home.
Ex-band mate Ringo Starr said his message for the couple was "peace and love".
Mike McCartney, Paul's brother, said of the ceremony: "It was lovely. I'm feeling happy for my brother."
He added: "Nancy's lovely too. She's one of us now."
James McCartney, Paul's son, was one of the first to arrive, followed soon after by his daughters Mary and Stella, who designed the bride's gown.
The widow of the late Beatle George Harrison, Olivia Harrison, arrived alongside the couple's son Dhani.
Fans cheered as famous faces such as pianist Jools Holland, Texas singer Sharleen Spiteri, artist Tracey Emin and guitarist Jeff Beck turned up at the house Paul bought in 1965, close to the Abbey Road Studios.
Ronnie Wood from fellow 1960s legendary rock band The Rolling Stones said he wished the couple a "very happy future" as he walked into the party.
Model Twiggy said: "I'm going to go in and give him a big kiss. We're very, very happy. We love them both to bits. She's lovely."
Many of the stars brought their children, and the reception was intended to be a low-key, family party.
Earlier in the day the happy couple were showered with confetti as they posed for pictures outside the registry office, where Paul had also married his first wife Linda.
They appeared delighted after the service and the groom raised his new wife's hand in the air in triumph.
He wore a dark suit with a white shirt and pale blue tie, while the 51-year-old haulage heiress chose a long-sleeved, knee-length white dress for the ceremony.
The couple arrived at the venue at around 3.30pm and were inside for about an hour and 10 minutes.
Hundreds of well-wishers and photographers waited for hours outside to catch a glimpse of the wedding party before they left in a car.
The couple posed for more pictures and kissed outside the reception at their north London home near St John's Wood.
Asked how he felt, he said: "Terrific, thank you. I feel married. I feel absolutely wonderful."
Paul shook hands with fans and gave high-fives.
The newlyweds had broken tradition by spending the morning of the wedding together, before leaving for the ceremony shortly after 3pm.
Members of the press scrambled to get the first glimpse of the bride's dress and to take pictures of her and the singer.
The date was reportedly chosen for the wedding because it would have been the 71st birthday of Paul's former bandmate John Lennon, who was assassinated in 1980.
The couple became engaged earlier this year after they began dating four years ago.