It's a royal surprise!
Kate Middleton and Prince William headed to Cardiff Castle in Wales as part of the festivities for Queen Elizabeth II's Platinum Jubilee and brought along two special guests—Prince George, 8, and Princess Charlotte, 7, the eldest of their three children.
The family all greeted well-wishers who lined up to see them, including performers and crew members involved in the special Platinum Jubilee Celebration Concert taking place in the castle grounds that day. During their trip, the Duke and Duchess of Cambridge and their kids checked out the show's music setup backstage.
Charlotte wore a navy wool coat dress and Mary Janes, while George and William sported navy suits and Kate was dressed in a red wool coat dress and black stiletto pumps.
"Cardiff, it's been wonderful to join you this #PlatinumJubilee weekend!" Kate and William wrote on Instagram. "So lovely to meet the stars and team behind tonight's concert at Cardiff Castle. We had an extra special drum demonstration for George and Charlotte, saw a stunning performance from the Wales Youth Choir for Good and had a sneak peak at how today's show will come together! Have a great time at the concert this evening!"
The family's visit to Cardiff Castle comes two days after all the Cambridges, including youngest son Prince Louis, 4, joined the Queen and other royals on a Buckingham Palace balcony to watch the Trooping the Colour parade.
The annual event is the official birthday celebration for the ceremonial monarch, who turned 96 in April, and kicked off four days of festivities for the Platinum Jubilee, which marks her 70th year on the throne.
Also spotted at Trooping the Color parade, William's brother Prince Harry and wife Meghan Markle, who did not watch from the balcony, which was reserved for senior royals. The couple left their royal positions two years ago.
See photos of the Cambridges during their visit to Cardiff Castle:
Queen Elizabeth II makes a surprise appearance with her family on a Buckingham Palace balcony during the Platinum Jubilee Pageant, the final Platinum Jubilee event, on June 5.
Queen Elizabeth II and Charlotte give Her Majesty's signature wave.
Queen Elizabeth II appears with son Prince Charles, his son Prince William and his eldest kids Prince George, 8, and Princess Charlotte, 7, on a Buckingham Palace balcony during the Platinum Jubilee Pageant.
Will and Kate's daughter looks at her great-grandmother.
Kate Middleton, Prince William and kids Louis, Charlotte and George appear at the Platinum Jubilee Pageant. Also spotted: William's cousin Zara Tindall's husband Mike Tindall and their daughter Mia Tindall, plus British Prime Minister Boris Johnson.
Louis cheers at the Platinum Jubilee Pageant.
Louis kisses mom Kate at the Platinum Jubilee Pageant.
Louis appears with mom Kate at the Platinum Jubilee Pageant.
George looks perplexed at the Platinum Jubilee Pageant.
George appears with dad William at the Platinum Jubilee Pageant.
Kate offers some helpful words to Louis.
Kate appears with Louis, Charlotte, George and William.
Louis waves while seated in between mom Kate and sister Charlotte.
Kate Middleton, Prince William and George and Charlotte watch the performances at the Platinum Party at the Palace, a musical celebration for Queen Elizabeth II's Platinum Jubilee in front of Buckingham Palace, on June 4, 2022.
Charlotte and George enjoy the Platinum Party at The Palace.
The crowd enjoyed music by Adam Lambert and Queen, Rod Stewart and Diana Ross, as well as performances from Andrew Lloyd Webber, Lin Manuel Miranda, and the London casts of Hamilton, The Phantom Of The Opera, The Lion King, Six and Joseph and the Technicolor Dreamcoat.
The four had a blast!
Earlier in the day, William, Kate, Charlotte and George visited Cardiff Castle in Wales as part of the festivities for Queen Elizabeth II's Platinum Jubilee.
The family greets fans at Cardiff Castle.
The family speaks to fans.
The four check out the Platinum Jubilee Celebration Concert's music setup backstage during their visit to Cardiff Castle.
Kate and William's eldest two kids join them at Cardiff Castle.
Kate holds Charlotte's hand.
The little princess and prince appear together with mom Kate.
William appears with his kids.
The family joins Queen Elizabeth II and other royals on a Buckingham Palace balcony to watch the Trooping the Colour parade, an annual belated birthday celebration for the ceremonial monarch, who turned 96 in April, which is also part of the Platinum Jubilee festivities.