Britain's Queen Elizabeth II, centre, surrounded by members of her family, watch a Royal Air Force fly pass by, on the balcony of Buckingham Palace, during the Trooping The Colour parade, in London, Saturday, June 15, 2013. Queen Elizabeth II celebrated her birthday with traditional pomp and circumstance _ but without her husband by her side. Prince Philip remains in the hospital, recovering from exploratory abdominal surgery. The queen invited her cousin, the Duke of Kent, to accompany her in a vintage carriage. Other royals including Prince Harry and the Duchess of Cambridge joined in the celebration Saturday. More than 1,000 soldiers, horses and musicians are taking part in the parade known as Trooping the Color, an annual ceremony. From left, Prince Edward, the Earl of Wessex, Lady Louise, James, Viscount Severn, Sophie, the Countess of Wessex, Camilla, The Duchess of Cornwall, Prince Charles, Anne, the Princess Royal, Timothy Laurence, Prince Andrew, Duke of York, Prince Harry, Kate, The Duchess of Cambridge, Prince William, Duke of Cambridge and Princess Eugenie.