Prince William and Kate Middleton have kissed twice on the balcony of Buckingham Palace after their wedding service in Westminster Abbey.
They were cheered by 500,000 well-wishers who gathered outside the palace, as RAF planes flew past in honour of the new royal couple.
Police estimate a million people lined the procession route from the abbey to the palace.
The bride will now be known as the Duchess of Cambridge.
The Queen is hosting a buffet reception at the palace for 650 guests.
Street parties
The church service, watched by 1,900 guests, ran smoothly but the prince did struggle to place the wedding ring on the duchess’s finger.
Following a long tradition, the ring has been fashioned from Welsh gold given to Prince William by the Queen.
After the couple said their vows, in which she did not promise to obey William, the Archbishop of Canterbury, the Most Reverend Rowan Williams, declared: “I pronounce that they be man and wife together, in the name of the Father, and of the Son, and of the Holy Ghost. Amen.”
They spent a private moment together with their families, as they signed the marriage register.
Prince William has been given the title of the Duke of Cambridge by the Queen, and Miss Middleton has become Her Royal Highness the Duchess of Cambridge on their marriage.
The duchess, who managed to keep her wedding dress a secret, is wearing an ivory and lace gown by Sarah Burton at Alexander McQueen. The prince is wearing the red tunic of an Irish Guards colonel – his most senior honorary appointment.
Royal officials said the couple were involved in planning their wedding day, from the music at the ceremony to the flowers and the cake.
Inside Westminster Abbey, an avenue of trees lined the red carpet leading up to the altar.
The bride walked up the aisle to coronation anthem I Was Glad, by Sir Charles Hubert Hastings Parry, from Psalm 122. Her brother James Middleton gave the Lesson, reading Romans 12: 1-2, 9-18.
Prince William and Kate Middleton made their vows to each other during their wedding ceremony at Westminster Abbey
Classical compositions by Elgar, Britten and Vaughan Williams featured during the ceremony, alongside the hymn Jerusalem and the English melody Greensleeves.
After the canape reception at Buckingham Palace, about 300 close friends and relatives will stay on for a formal black tie dinner and disco in the evening, hosted by Prince Charles.
But the Queen and the Duke of Edinburgh will leave for a weekend away after hosting the lunchtime reception and will miss Prince Harry’s best man speech and Michael Middleton’s father of the bride address.
Despite predictions of showers, it stayed dry for the royal couple. Temperatures in London were expected to reach a high of 19C (66F) in the afternoon.
