The portrait – which is proudly shown off at Windsor Central train station – presumably appeared after Prince Harry and American actress Megan – now the Duchess of Sussex – got married earlier this year.
Meanwhile, early on Friday some wellwishers started arriving in Windsor to see Princess Eugenie marry.
Eugenie, who is ninth in line to the throne, and tequila brand ambassador Jack Brooksbank will say their vows in the gothic surrounds of 15th century St George’s Chapel, Windsor Castle.
The Queen and the Duke of Edinburgh, the Prince of Wales, the Duke and Duchess of Cambridge and the Duke and Duchess of Sussex are all expected to be there for the grand royal celebration, joining an 850-strong congregation of celebrities, royals and VIP guests.
Twitter user Aine Fox commented that whilst there were some crowds, they weren’t on the scale of the year’s other memorable royal wedding.
‘Not quite the early-morning crowds of May for Harry and Meghan’s big day,’ she commented.
However, other royal fans have been eagerly awaiting the historic day.
Tina Howe, 41, and Steph Higgins, 42, have come down from Manchester to get a glimpse of the royal wedding.
The pair have brought two bottles of Prosecco with them, with special made labels including the date and the words Royal Road Trip.
Talking about the cost of policing the royal wedding, Ms Howe said: “It’s not (Princess Eugenie’s) fault that she is who she is”.
Ms Howe, wearing a Union flag onesie, said: “The royal family are our ambassadors for Britain, they bring people into Britain and it’s absolutely right that we protect them.
“They bring more revenue than the cost of a day like today.”