12:39 19 December 2016
Queen Elizabeth and Prince Charles posed together in a new historic photograph to mark the end of her 90th birthday year. The photo, which was taken in May, shows the royals in the White Drawing Room at Windsor Castle.
Fashion photographer Nick Knight, who took the photo before the final night of celebrations at the Royal Windsor Horse Show, said: "It was a great pleasure and an honour to photograph Her Majesty The Queen and HRH The Prince of Wales at Windsor Castle.
"I wanted to create a modern portrait that showed warmth and humanity as well as strength and tradition."
The Queen’s 90th birthday in April was celebrated with a series of events, including a private black tie banquet at Windsor Castle with her loved ones and friends. However, the Queen’s birthday was officially marked in June with a service of thanksgiving and a picnic on The Mall.
Speaking at the event, the Queen joked: "How I will feel if people are still singing Happy Birthday in December remains to be seen."