Sang Tan, Associated Press
Peter Phillips and Canadian Autumn Kelly leave St. George's Chapel in Windsor, England, after their marriage ceremony on Saturday.

The eldest grandson of Queen Elizabeth II married his Canadian fiancee Saturday in a private ceremony at Windsor Castle in England.

Peter Phillips and Autumn Kelly wed at the castle's 15th-century St. George's Chapel in front of 300 guests, including the queen, Prince Philip, Prince Charles, and Phillips' mother, Princess Anne. Prince Harry, the third in line to the throne, and his girlfriend, Chelsy Davy, were also there.

Phillips — the 11th in line to the throne — met Kelly in 2003, when both were working at the Montreal Grand Prix.

The couple, both 30, live in London. Phillips works for the Royal Bank of Scotland while Kelly, a graduate of Canada's McGill University, is a personal assistant to broadcaster Sir Michael Parkinson.