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Two weeks and counting!

Exactly 14 days before the big day, Kate Middleton took part in her very first wedding rehearsal at London's Westminster Abbey on Friday -- but her hubby-to-be couldn't make it.

A Clarence House spokesman confirms to Us Weekly that a wedding rehearsal took place at the famed cathedral Friday morning, with Prince Harry, her sister (and maid of honor) Pippa Middleton and all of the bridesmaids and page boys joining Middleton, 29.

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

Where oh where was Middleton's man? Prince William, 28, had to stay behind in Wales to tend to his Royal Air Force duties.

For more on the Royal Wedding, including rare photos, interviews with family and friends, details on Kate's new life as a princess and a tour of their lavish homes, order a copy of Us Weekly's Will & Kate: The Royal Wedding now.