Three months after announcing her cancer diagnosis, Kate Middleton has returned to public life. On Saturday, the Princess of Wales waved to onlookers from the balcony of Buckingham Palace in honor of the annual Trooping the Colour parade — her first official appearance since last Christmas, per the New York Times. The Princess, who is currently undergoing cancer treatment, was flanked by her husband Prince William, as well as King Charles, who is also receiving treatment for an unspecified type of cancer.