Prince Harry and Megan Markle have extended words of support to their Kate Middleton, who recently disclosed that she has been undergoing treatment for cancer. The Princess of Wales on Friday put an end to rumours and speculations after releasing a video of her informing the public about her health. Prince Harry and Megan Markle have extended words of support to their Kate Middleton, who recently disclosed that she has been undergoing treatment for cancer. The Princess of Wales on Friday put an end to rumours and speculations after releasing a video of her informing the public about her health.