Happy 13th birthday George! William and Kate share new photo of eldest son as he becomes a teenager

A new birthday photo has been released of Prince George as the young royal celebrates turning into a teenager.George, who reached his 13th birthday on Wednesday, was pictured at Kensington Palace in a portrait captured after he returned from last month’s Trooping the Colour.The colour image, showing a relaxed George standing with his hands in his pockets and wearing an open-necked white shirt and dark suit, was shared on the Prince and Princess of Wales’ social media, alongside the message “Happy 13th Birthday, George!” followed by a party popper emoji.It was taken by Matt Porteous – William and Kate’s go-to photographer for family celebrations.Future king George is heading to a new school in September, following in his father’s footsteps by attending the prestigious Eton College, close to his Windsor home.Prince George and Princess Charlotte in the royal box at Wimbledon (Mike Egerton/PA)He was last seen out with his family when he and 11-year-old Princess Charlotte joined William and Kate in the royal box at Wimbledon.British wildcard Arthur Fery invited the siblings to play tennis with him when they chatted while attending the men’s singles final.George, Charlotte and their younger brother Prince Louis will now be enjoying their summer holidays.William and Kate leave the Lindo Wing of St Mary’s Hospital in London, with their newborn son, Prince George in 2013 (Dominic Lipinski/PA)George has finished his time at Lambrook School, the private co-ed prep school in Berkshire where he occasionally boarded, ready for his transition to boys-only Eton, where fees are more than £65,000 a year.Prince George Alexander Louis was born in the private Lindo Wing of St Mary’s Hospital, Paddington, London, at 4.24pm on July 22 2013, weighing 8lb 6oz.