Meghan Markle and Prince Harry's closest and most trusted family and friends looked on as the couple said their wedding vows and became husband and wife.
They invited just their 'inner circle' to the private evening celebrations, which was filled with dancing, booze and personalised touches.
But everyone who got one of those very special invitations had to follow a lot of very, very strict rules, which allowed the couple to ensure their celebrations were completely private.
As Meghan and Harry mark their second wedding anniversary, we've had a look back at all the dos and don'ts of the couple's stunning May wedding.
In the lead up to the big day, each guest was sent a seven-page instructions book, explaining exactly what they needed to do and all the things that were banned.
When they arrived at the evening reception they had to "surrender mobile telephones and any devices used for image capture".
Bulky bags were also banned, and guests weren't allowed to take presents into either the St George's Chapel ceremony or the Windsor Castle reception.
A dress code was also sent to guests as part of the invitation, asking men to wear either a dress uniform, morning coat or lounge suit, while women had to pick a day dress and a hat.
The guidance pack also included a long list of things people were banned from taking with them, and some of them were a bit odd.
Perhaps the strangest prohibited item they felt they needed to list is swords.
The reason behind the odd request was that by asking people to wear dress uniform, some may have wondered if they should include the sword which is part of many of them.
The couple also asked people not to wear medals on the big day.
Guests are also banned from bringing presents into the grounds.
Meghan and Harry asked that people didn't buy them any gifts for their big day, but instead to donate to one of their seven chosen charities . Understandable, as nobody wants to end up with 3,000 gravy boats.
As well as their friends and family, Meghan and Harry invited 2,640 members of the public to join them.
They celebrated in the grounds of Windsor Castle, dressed up in their finest frocks