Kate Middleton’s 43rd birthday celebrations revealed as Prince William praises wife’s strength in loving tribute

Kate Middleton is 43!

The Princess of Wales is celebrating her birthday surrounded by those nearest and dearest to her on Thursday, The Post can reveal.

While Princess Catherine has spent much of her time at Sandringham Estate in Norfolk, England over the festive break, she is set to spend the special day at Adelaide Cottage, the Wales’ family home.

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On Thursday, Prince William took to social media to share a loving tribute to the beloved royal as he praised her strength after what’s been a difficult year for their family.

“To the most incredible wife and mother,” the future king wrote on X. “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 concluded, alongside a black-and-white photo of the princess.

As for the celebration itself, King Charles’ former personal butler Grant Harrold says it will be an intimate, family-filled affair.

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“I have no doubt that the King and Queen will have a dinner for her at some point either at Clarence House or Highgrove as the King is quite good at that kind of thing,” Harrold exclusively told The Post.

“And William will be making sure there is a nice meal and some gifts and it will be celebrated with the children, who will of course want to celebrate with her,” adds Harrold, who previously worked for the king for seven years.

While the mom of three’s birthday is often a low-key event, given its proximity to Christmas, this year’s celebrations may look slightly different given the difficult year Middleton has had health-wise.

As Princess Catherine is “returning back to royal duties and obviously is doing well with her treatment,” Harrold suspects that the princess’ parents, Carole and Michael Middleton, will join in on the celebration.

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On Thursday, the royal family’s official social media accounts also shared a post in honor of the princess’ special day.

“Happy Birthday to The Princess of Wales! 🎂,” King Charles and Queen Camilla’s account wrote on X, alongside a photo of her holding flowers during the Christmas day service at St Mary Magdalene Church in Sandringham last month.

The former royal staffer believes Middleton may hear well-wishes from two estranged members of the royal family: Prince Harry and Meghan Markle.

“I think Harry and Meghan will reach out to wish her happy birthday,” Harrold told The Post on behalf of Slingo. “I always get the impression that despite the damage within the family, I still think they would reach out to each other.”

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“So whether that be a phone call, text message or WhatsApp an e-mail or a traditional card,” Harrold says, “It depends on the relationship. If it is improving, which is what I still think is happening, it’s possible that it will be a phone call.”

The same day Middleton rings in her 43rd birthday, Prince Edward will be jetting off to the US to represent the king and the rest of the royal family at former President Jimmy Carter’s funeral in Washington, D.C.