LONDON – Catherine, Princess of Wales joined other British royals on the balcony of Buckingham Palace for the King’s official birthday, capping her first public appearance since being diagnosed with cancer.

The Princess of Wales, her husband William, their children George, Charlotte and Louis gathered together with King Charles and Queen Camilla to watch a Royal Air Force flypast. They waved and smiled at the crowd, who responded with cheers. The Princess, also known as Kate, was earlier driven in a state carriage with her children from Buckingham Palace to Horse Guards Parade to watch the celebration, known as Trooping the Colour. She could be seen wearing an Irish Guards regimental broach, a nod towards her role as their honorary colonel.

The family were later seen watching events from a viewing point, while Kate’s husband William, the Prince of Wales, rode on horseback. For Kate, it was her first public appearance since Christmas Day – weeks before her cancer diagnosis. Kate stepped away from public duties in January, following what Kensington Palace said at the time was surgery for a non-cancerous abdominal condition. In March, amid speculation about her wellbeing, she revealed she had been diagnosed with cancer after the operation, and was undergoing treatment.

King Charles III and Queen Camilla were also taken in a carriage from Buckingham Palace, bringing cheers from the packed crowds as they made their way slowly up The Mall. The King took part riding a carriage rather than on horseback this year due to his own cancer diagnosis. People of all ages gathered along the length of the Mall for the event. Some onlookers are wearing Union Jack bucket hats and fascinators, while others are waving flags. Some sang the national anthem. (CNN)…[+]