Mashable: Prince of Wales, William, is celebrating his 42nd birthday on Friday, June 21. To mark the special occasion, his wife Kate Middleton shared a special tribute on the official Kensington Royal social media accounts. The elder son of King Charles III, who is also the heir to the British throne, was seen jumping alongside his three children Prince George, 10, Princess Charlotte, 9, and Prince Louis, 6, in an adorable family photo.

The moment was captured in Norfolk, England, at Kensington Palace, last month wherein Prince William hold hands with his kids and make funny faces looking at the camera. "Happy birthday Papa, we all love you so much! Cx," reads the caption of the tribute by the Princess of Wales.

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A similar family photograph of Prince William was shared on Instagram to celebrate Father’s Day a couple of days ago.

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This comes at a time when Kate Middleton was recently spotted making her first public appearance since confirming her cancer diagnosis in March. She attended ‘Trooping the Colour’, an annual military parade organized in central London to commemorate King Charles’ birthday on June 15.

Ahead of making her public appearance, Kate Middleton also shared a health update on Instagram thanking supporters of the Royal Family for sending her words of encouragement amid her cancer battle. “I have been blown away by all the kind messages of support and encouragement over the last couple of months. It really has made the world of difference to William and me and has helped us both through some of the harder times,” she wrote.

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Kate Middleton added, “I am making good progress, but as anyone going through chemotherapy will know, there are good days and bad days. On those bad days you feel weak, tired and you have to give in to your body resting. But on the good days, when you feel stronger, you want to make the most of feeling well.”

The Princess of Wales confirmed her treatment is ongoing and will continue for a few more months.

Kate Middleton and Prince William got married in April 2011 at Westminster Abbey in London, England.