The pair rather sweetly kept catching each other's eyes and smiling throughout the ceremony.
After a very public split in 2007, following years of intense media scrutiny and the upheaval of William's military career, we're thrilled to see them finally tie the knot.
The couple signed three registers to officiate the ceremony in private, in the Chapel of St Edward the Confessor.
And while die-hard have been camping outside Westminster Abbey, it looked like the Queen could barely keep her eyes open and appeared to be nodding off at certain points during the ceremony.
Kate Middleton is now officially Catherine Duchess of Cambridge. Take a look at the video below to see the moment when the newlyweds made their vows.