Trooping the Colour: All the best pictures from Queen Elizabeth's 90th birthday celebration

Trooping the Colour – a London ceremony to celebrate Queen Elizabeth's birthday – takes place every year on a Saturday in June. With the 2017 Trooping the Colour ceremony happening this Saturday, June 17, here's a look back at last year's spectacular event, which marked Queen Elizabeth's 90th birthday.Photo: Getty Images

The Duchess of Cornwall, Kate Middleton and Prince Harry were the first royals to leave Buckingham palace. The trio were driven to the Horse Guards Parade in a carriage.Photo: Getty Images

Kate wore her stunning cream Alexander McQueen coat and a pale pink Philip Treacy hat for the official engagement.Photo: Getty Images

Queen Elizabeth thrilled royal fans by wearing a vibrant green Stewart Parvin outfit. The bold choice came as a shock as the monarch is known to favor pastel colors.Photo: Getty Images

Thousands of well-wishers lined the Mall in London to wave to the Queen and her husband Prince Philip.Photo: Getty Images

Prince Harry looked resplendent in his Household Cavalry Number 1 ceremonial, with Forage Cap. Photo: Getty Images

The Earl and Countess of Wessex were joined by their children Lady Louise Windsor and James, Viscount Severn. This was the first time that both children had attended the parade together.Photo: Getty Images

Princesses Beatrice and Eugenie joined their father Prince Andrew in the carriage on their way to watch the parade.Photo: Getty Images

Prince William joined his father, Prince Charles and his aunt, Princess Anne, to take part in the parade on horseback.Photo: Getty Images

Queen Elizabeth's daughter, Princess Anne, honored her mother by riding a horse named Elizabeth in the parade.Photo: Getty Images

The family united on the balcony of Buckingham Palace to wave to well-wishers that had gathered on the Mall.Photo: Getty Images

Princess Charlotte made her Trooping the Colour debut alongside her brother Prince George on the Buckingham Palace balcony. The appearance was the first time the one-year-old had been seen in public.Photo: Getty Images

The young Princess was held by her mother, Kate Middleton, as her brother Prince George stood at the front of the balcony next to his father. The young boy gazed up in awe at the RAF flypast that made its way down the Mall and over the palace, leaving trails of red, white and blue smoke.Photo: Getty Images