The armed forces have taken part in a big dress rehearsal of the royal wedding route while most of you were still asleep.
Thousands of people are expected to line the streets from the palace to Westminster Abbey to see Prince William and his bride arrive.
Up to 1,000 members of the Army, Navy and RAF set off before dawn on Wednesday to take part in the practice procession to Westminster Abbey.
Some of the soldiers, sailors and airmen involved have worked with Prince William.
Royal fan Terry Hutt sits outside his tent at Westminster Abbey, watching the dress rehearsal as it unfolds in the darkness.
Union Jack flags line the Mall in central London, which will see crowds of hundreds of thousands on Friday, all waiting to catch a glimpse of the royal couple after they are married.
Prince William and Kate Middleton are due to marry at Westminster Abbey on Friday 29 April and London is busy preparing itself for the huge event.
Security checks around Westminster Abbey are really tight. This police officer is making sure there's nothing hidden in these tubes before they're used in scaffolding nearby.
The Band of the Royal Marines are making the most of some last minute rehearsals to make sure they get everything just right when they play at the couple's wedding.
Meanwhile lots of people across the UK are baking for street parties, including the Prime Minister's wife, Samantha Cameron, who's getting ready for Downing Street's party.
With two full days left to go, royal fan John Loughrey became the first person to start camping outside the Abbey to make sure he gets a good viewpoint on Friday 29 April.
Mr Loughrey said he's always been loyal to the royal family and thinks they're good for British tourism.
And he's not alone. Hundreds of thousands of people are expected to cram into The Mall on Friday to cheer on the royal couple as they return to Buckingham Palace.
Guen Murray, who's 76, was the second person to save her place outside Westminster Abbey. She said she wants to get a good look at Kate's dress!