Believe it or not, we love a wedding here at YYW, so imagine our joy when we found out Princess Eugenie and Jack Brooksbank would be tying the knot on a Friday, meaning we're being PAID to watch it!
We'll be here, reporting live as it happens - keep your eyes on this page for all the updates as they come through.
The flowers for the day were designed by Rob Van Helden, who said he worked closely with the couple to design the floral look, saying Eugenie and Jack had "a lot of input" in the arrangements, which include foliage, berries and hydrangeas from Windsor Great Park.
We're completely in love with the autumnal design for the day.
Celebrities guests are already arriving at St. George's Chapel, with Jimmy Carr, Pixie Geldof, Tracey Emin and Oliver Proudlock leading the way.
Prince Harry's ex Chelsy Davy is in attendance in a powder blue ensemble.
Kate Moss, Holly Valance, Demi Moore and Liv Tyler have all just arrived, while Naomi Campbell arrived in a striking hat.
Ellie Goulding, Ricky Martin, James Blunt and Stephen Fry have made their entrance, ahead of the royals, who should be arriving soon!
Robbie Williams and Ayda have just arrived; their daughter Theodora is acting at bridesmaid for the couple.
All guests need to be suited within the next five minutes. They will be entertained by the Royal Philharmonic Orchestra, as well as Andrea Bocelli, who is a close friend of Eugenie's mother, Sarah Ferguson.
Cara Delevingne has just arrived alongside Prince Edward and Sophie Wessex and their young son.
Zara Phillips, Mike Tindall and Princess Anne have all arrived at the chapel. Princess Anne looks resplendent in a green ensemble.
Prince Harry and Meghan have arrived, as have Prince William and Kate Middleton. Meghan's in a chic navy ensemble by Givenchy, while Kate is dressed in a pretty cranberry hued outfit by Alexander McQueen. The four of them slipped in quietly, avoiding drawing attention to themselves on what is Eugenie's day.
The castle is waiting for Sarah Ferguson to arrive, with baited breath. In the meantime, we're watching Kate and Meghan in the pews, looking as flawless as ever.
Jack is making his way up the chapel steps, looking dapper.
In coordination with Princess Anne, Sarah Ferguson is wearing an emerald green dress paired with a gold and green striking hat, Beatrice is in a royal blue outfit by Ralph and Russo. She's maid of honour today, but has arrived with her mother rather than with the bride.
She has eschewed her usual striking hat for a demure headband.
Princess Charlotte and Prince George are arriving, with the little princess waving away as always! The flower girls are wearing white dresses with green belts.
Prince Charles has arrived, wearing a lovely lilac tie.
The Queen and Prince Philip have arrived, with the Queen is a pretty pale duck egg blue outfit.
We've had our first glimpse of Princess Eugenie! She is wearing an almost off-the-shoulder wedding dress, with a dipped low back, complemented by a low-bun up-do.
Eugenie is carrying a pretty white wedding bouquet - a big departure from the colourful wedding arrangements. She's wearing a striking tiara, fit for a princess, complete with a beautiful emerald stone, borrowed from the queen.
Her dress is by Peter Pilotto and has a striking train, while her shoes are by Charlotte Olympia.
The couple have spoken their vows, Andrea Bocelli is singing Ave Maria. We suspect there isn't a dry eye in the house...
Charles Brooksbank is performing a reading, followed by Princess Beatrice, who is doing a reading from Great Gatsby.
They chose this passage as Eugenie said it brought Jack to her mind, particularly the words about his smile: “It was one of those rare smiles with a quality of eternal reassurance in it. It concentrated on you with an irresistible prejudice in your favour."
It's time for another song from Andrea Bocelli - at least they're getting their money's worth!
The congregation are praying, following the singing of a hymn.
The congregation is singing Love Divine All Loves Excelling - and sounding rather lovely too.
The register is being signed.
The congregation is singing God Save The Queen
Eugenie and Jack are exiting the church as man and wife.
The all important kiss has happened outside of the church!
The couple have got into a horse drawn covered carriage, accompanied by bagpipes, off on their first journey as husband and wife.