To celebrate the end of Queen Elizabeth's 90th birthday year, a new portrait shot by British fashion photographer Nick Knight, has been revealed to the public. The longest reigning monarch is captured sitting down in an elegant brocade dress, while her son Prince Charles – the future heir to the throne – is dapperly standing by her side. Knight shot the British royals inside Windsor Castle just one month after her birthday celebrations began in April.

Knight – who has previously worked with several coveted brands including Comme des Garcons, Alexander McQueenDior and won the Isabella Blow Award for Fashion Creator at last year's British Fashion Awards – took to his Instagram account to express that he's "very proud and honoured to have taken this portrait of Her Majesty The Queen and The Prince of Wales. It was made in celebration of the year of Her Majesty's 90th birthday."

Queen Elizabeth II and Prince Charles in a new portrait shot by Nick Knight

Now, see Queen Elizabeth II and the British royals at this year's Remember Sunday event.