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\t\t<\/p>\n Prince William<\/strong><\/a> is celebrating Princess Kate<\/strong><\/a> (AKA Kate Middleton<\/strong>) on her 43rd birthday.<\/p>\n The 42-year-old royal paid tribute to his wife on Thursday (January 9).<\/p>\n \u201cTo the most incredible wife and mother,\u201d he captioned a sweet tribute post on their Instagram account.<\/a><\/p>\n Keep reading to find out more\u2026<\/em><\/strong><\/span><\/p>\n \u201cThe strength you\u2019ve shown over the last year has been remarkable. George<\/strong><\/a>, Charlotte<\/strong><\/a>, Louis<\/strong><\/a> and I are so proud of you. Happy Birthday, Catherine<\/strong>.\u201d<\/p>\n \u201cWe love you. W<\/strong>,\u201d he concluded.<\/p>\n The caption came with a prevously unseen portrait of the princess, taken by Matt Porteous<\/strong> in Windsor, in the summer of 2024.<\/p>\n Kate<\/strong> is spending the day at home at Adelaide Cottage, Windsor with her husband and children, who returned to school after the Christmas break on January 8, People<\/a><\/em> reports.<\/p>\n Kate <\/strong>revealed that she had completed her chemotherapy treatment for cancer in September.<\/a><\/p>\n The Royal Family recently made their annual Christmas morning appearance! See photos of the family all together.<\/a><\/p>\n <\/span><\/p><\/div>\n