Kate Middleton unveils sweet new photo of Prince George marking his ninth birthday

The Duke and Duchess of Cambridge have shared an adorable new photo of Prince George to mark his ninth birthday.

The image shows Prince George grinning from ear-to-ear wearing a light blue polo shirt and matching navy shorts.

"George is turning 9!" the couple wrote on Instagram.

The photo was taken by Kate Middleton, which has become an adorable tradition over the years. This year's birthday snap was at the beach earlier this month while the Cambridges were on holiday in the UK.

Prince George's toothy grin shows a cheeky side to the eldest child of Prince William and Kate Middleton, who is looking more and more like his royal father every year.

His siblings, Princess Charlotte turned seven in May, and Prince Louis turned four in April.

Happy Birthday, Prince George!