The photographer's been appointed and invitations have been sent out.
And now Buckingham Palace can cross one more item off its to-do list since the official hat-maker for the royal wedding has been confirmed.
Kate Middleton has commissioned Philip Treacy to create the headgear for the special day.
His spokesman confirmed they were working for the royal wedding party but added: "It's a private client so we can't comment."
Twenty-nine-year-old Kate is a fan of Philip's designs, choosing one of his creations for Prince William's passing-out parade in 2006.
The award-winning milliner also designed both of the headresses Camilla wore on her wedding day in 2005 (pictured).
A source said: "Philip has taken numerous phone calls from the Duchess of Cornwall since December and he was summoned to the Palace to meet Kate."
The source added: "Camilla and Philip have remained friendly since he designed for her and the respect is mutual. Philip thinks the Duchess has great style."
Photo: © Rex