Kanye West and Kim Kardashian have gotten married.

The couple, who went public with their relationship in April 2012 and have 11-month-old daughter North, exchanged vows in front of approximately 200 guests during an outdoor sunset ceremony at the Forte di Belvedere in Florence, Italy today.

A source told PEOPLE.com that Rich Wilkerson Jr., a pastor from North Miami, performed the ceremony, which was organised by long-time Kardashian family friend and celebrity event planner Sharon Sacks, who also planned Kim's second wedding to Kris Humphries in 2011.

Kanye appeared to be very nervous beforehand, swigging obsessively from a bottle of water. "It was funny how nervous he was. He clearly knew the gravity of what he was about to do. This morning he was all smiles, but as it got closer, you could see that the nerves were kicking in. It's common for most grooms. I've seen it all before," an eyewitness said.

Another source told E! News that Kim arrived at their wedding venue with her grandmother, Mary Jo Shannon, shortly after catching a private jet with her bridal party, including sisters, Kourtney and Khloe Kardashian, and mother, Kris Jenner, from Paris, where the couple enjoyed a pre-wedding celebration at the Palace of Versailles on Friday night.

"A convoy of cars arrived at around 3 p.m. local time. Kim was in the first car, which was a Mercedes-Benz. They drove the car right up and her assistant opened the door and Kim dashed in. She looked to be wearing white. Kourtney was carrying her daughter Penelope and her son Mason--in a red-striped outfit--followed behind. Kris Jenner got out of second car wearing black suit. And she put a big professional camera on a strap on her shoulders. She has obviously been taking professional pictures to remember the occasion," an onlooker said.