Can you believe it was less than a year ago that Kate Middleton was forced to reveal her cancer diagnosis publicly after weeks of wild speculation about her whereabouts? Today, she turns 43, and her husband, Prince William, acknowledged her special day with a sweet Instagram post honoring her strength. “To the most incredible wife and mother,” he wrote. “The strength you’ve shown over the last year has been remarkable. George, Charlotte, Louis and I are so proud of you.