Kate Middleton Serene in New Birthday Photo as Prince William Says, ‘We Love You’ [Video]

Prince William is celebrating his love and admiration for Kate Middleton as she marks her 43rd birthday.

In a message posted to the couple’s social media, William, 42, paid tribute to Kate after a year in which she had a major operation, a cancer diagnosis and debilitating chemotherapy treatment.

“To the most incredible wife and mother,” he wrote on Thursday, Jan. 9. “The strength you’ve shown over the last year has been remarkable. George, Charlotte, Louis and I are so proud of you. Happy Birthday, Catherine.”

“We love you. W,” he closed the message.

It was coupled with a stunning previously-unseen portrait of the princess, taken by Matt Porteous, in Windsor, last summer.

William and Kate don’t often post personal messages on their social media and this marked a rare public declaration of William’s love and support for his wife who has been through so much since her last birthday.

She is spending the day at home at Adelaide Cottage, …