Who are the most famous sinners in history?
Also in 2018, Prince Philip stepped out with the Queen and granddaughter Zara Tindall. They visited Balmoral Castle.
Imagine this: it's date night, and you've got tickets to 'Hamilton.' You're enjoying the show, when suddenly a very special guest shows up on stage. It's Prince Harry making a star appearance as King George III. You're stunned, of course!
Perhaps one of the biggest surprises, the Queen showed up to London Fashion Week. She was right by the runway with Vogue editor Anna Wintour.
Harry and William surprised crowds and took a walk around Windsor Castle in May 2018.
For her 92nd birthday, the Queen pulled up to the Royal Albert Hall stage. She surprised audiences at home and in the crowd, who sung a joyous 'Happy Birthday to You.'
In 2018, Kate Middleton surprised with an appearance at the Royal Air Force centenary in London. There, she reunited with the “Fab Four.”
Prince Charles and Prince Harry made a rare surprise appearance in February 2018. The duo showed up to an event for The Prince of Wales’s International Sustainability Unit.
Kate Middleton and her sister, Pippa (pictured), made a surprise visit to Sandringham House. They also attended a Sunday morning service at St. Mary Magdalene Church.
Prince William made a surprise appearance in Toronto, albeit through a pre-recorded video clip. He spoke at a youth mental health summit, offering some special words of wisdom.
Staff Christmas parties aren’t all that, unless Meghan Markle makes a surprise appearance. She showed up to the Queen’s staff Christmas party in 2017.
The Queen celebrated the 150th anniversary of the Aboyne Highland Games by making a surprise appearance.
In 2017 Princess Anne honoured Father's Day in a very special way. She visited fathers who were working on a 'DIY SOS' project, renovating the house of a disabled father.
Prince Harry and Meghan Markle made a surprise visit to Belfast. They were there to meet members of the public, as well as to visit Belfast’s biggest sites.
In 2017, Kate Middleton made an unannounced visit to Paddington station, where a charity benefit was taking place.
Kate Middleton surprised crowds at a conference hosted by the Anna Freud National Centre for Children and Families.
London’s Borough Market was hit with a shocking terrorist attack in 2017. When the market reopened, Prince Harry surprised crowds to show support.
Similarly, Prince William surprised Manchester police to give his thanks following the terrorist attack that struck the city.
Prince Harry sure loves a surprise. In April 2017, he made a surprise visit to double amputee Duncan Slater (left), so as to give his thanks and pay respect.
In 2015, Prince Harry paid a surprise visit to the Duke of York’s Royal Military School in Kent. There, he toured and chatted with excited pupils.
In 2014, the Duke of Kent made an unexpected appearance in Swindon. There, he presented the Queen's Award to Shirley Ludford, manager of Radio Swindon 105.5.
The Duke of Kent shocked residents at Harewood House with a surprise visit, complete with military entourage.
Imagine sitting down for school dinner, turning your head and seeing Prince William. The royal visited John Henry Newman School for an unexpected appearance.
The Duchess of Cornwall made not one, but two surprise visits in Edinburgh.
Young pilots Libby and Michael had the surprise of a lifetime when Prince Philip came to say hi. His Royal Highness made a surprise visit to the British Airways HQ.
A few years ago, Prince Charles gave a personal royal approval to newlyweds in Ayr, Scotland.
See also: Casual wear: When royals dress down
Sophie, Countess of Wessex, made a surprise visit to Leeds Children’s Hospital back in 2013. She was there to support Nikita Chidwick, who was due to undergo an operation.
Prince William made a surprise visit to the Commonwealth Games in 2014. He thanked workers and staff of the Games.
In 2014, Prince Harry shocked staff when he showed up to a youth centre recording studio in Nottingham.
Prince William made a surprise video call to a family in the UK in 2020. Leanne and her five-year-old son, Kaydyn, were shocked and extremely happy.
All the times the British royal family turned up in unexpected places
How often does this happen?
CELEBRITY Royals
Recently, Prince William made a surprise video call to a family in the UK. Leanne and her five-year-old son, Kaydyn, were shocked, because how often does this happen? More than you'd expect, it seems, as the royals have a habit of popping up without warning. Here's a rundown of the best surprise appearances by the British royals.