Catherine, Princess of Wales, turns 43 on Jan. 9 and received a sweet message from her husband, Prince William.

Prince William has publicly wished his wife, Catherine, Princess of Wales, a happy birthday. Catherine turned 43 on 9 January, and William took to social media to celebrate her. He posted a previously unseen black and white photo of his wife,

Prince William is honoring his wife, Princess Catherine, on her 43rd birthday, calling her "the most incredible wife and mother."