Royal Wedding Countdown: First Rehearsal Takes Place; Official Schedule Released!

Just 12 days to go.

Set to marry Prince William in front of pretty much the whole world on April 29, Kate Middleton took part in her first rehearsal at London's Westminster Abbey.

A Clarence House spokesman confirms that a royal wedding rehearsal took place at the famed cathedral on Friday, with the lovely bride-to-be on hand.

Prince Harry, Kate's sister (and maid of honor) Pippa Middleton and her bridesmaids were there. William was tending to his Royal Air Force duties.

"We can confirm that Catherine Middleton and Prince Harry took part in a rehearsal at Westminster Abbey this morning," the rep confirmed Friday.

Exciting stuff. Meanwhile, a schedule of events for the big day was released:

8:15 - 9:45 a.m.: Guests arrive at Westminister Abbey

9:50 a.m.: Governors, General and Prime Ministers of Realm Countries, the Diplomatic Corps and other distinguished guests arrive at the Abbey

10:10 a.m.: Prince William, 28, and his Man of Honor Prince Harry, 26, leave Clarence House; they arrive at the Abbey at 10:15 a.m.

10:20 a.m.: Members of foreign royal families arrive at Westminister Abbey

10:20 a.m.: Middleton's mother, Carole, and brother, James, leave the Goring hotel; they arrive at the Abbey at 10:27 a.m. As first reported by Us Weekly last fall, Middleton, 29, will spend the night before her wedding with her family at the Goring Hotel.

10:25 a.m.: Members of the royal family (except those listed below) leave Buckingham Palace for Westminister Abbey

10:35 a.m.: The Princess Royal and Vice Admiral Timothy Laurence, The Duke of York, Princess Eugenie of York, Princess Beatrice of York, and The Earl and Countess of Wessex leave Buckingham Palace for the Abbey

10:38 a.m.: Prince Charles and The Duchess of Cornwall leave Clarence House for the Abbey

10:40 a.m.: Queen Elizabeth and The Duke of Edinburgh leave Buckingham Palace for the Abbey

10:48 a.m.: The Bridesmaids and Pages leave the Goring Hotel for Westminister Abbey

10:51 a.m.: Future Princess Kate Middleton and father Michael leave the Goring hotel for the Abbey

11:00 a.m.: The Marriage Service begins!

12:15 p.m.: The Carriage Procession of Prince William and Middleton, followed by The Queen's Procession, leaves the Abbey and heads to Buckingham Palace

12:30 p.m.: The Bride's Carriage Procession arrives at Buckingham Palace

12:40 p.m: Members of the Royal Family and Members of Foreign Royal Families arrive at Buckingham Palace

12:40 p.m. onward: Other guests arrive for the reception at Buckingham Palace

1:25 p.m.: Queen Elizabeth, Middleton and Prince William--along with their families--appear on the balcony

1:30 p.m.: The Royal Air Force flies by

[Photo: WENN.com]