Royals including Queen Elizabeth II, Prince Charles - father of the groom - and best man Prince Harry, as well as stars including Elton John and the Beckhams, watched the couple become man and wife in a historic and emotional ceremony overseen by the Archbishop of Canterbury Dr Rowan Williams.
The momentous event, watched by some 1,900 people, ran smoothly aside from a single hiccup when William struggled to place the ring on Middleton's finger.
After the couple said their vows, the Archbishop 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."
The newlyweds, who were granted the titles of Duke and Duchess of Cambridge by the Queen earlier today, are now travelling past the crowds in an open top carriage as they make their way from Westminster Abbey to Buckingham Palace.
Details of Middleton's dress, designed by Sarah Burton for Alexander McQueen, were kept secret until her arrival at the ceremony.
Watch Prince William and Kate Middleton exchange their vows below:
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