Prince William and Kate Middleton pay tribute to Prince Philip with a black-and-white photo on their website

• Prince William and Kate Middleton shared a photo tribute to Prince Philip on their website.
• They changed their cover photo on Twitter to an image of Philip after he died on Friday.
• Meghan Markle and Prince Harry also honored the duke on their website.

The Duke and Duchess of Cambridge have honored Prince Philip with a photo tribute on their website.

Prince William and Kate Middleton's charity, the Royal Foundation, displayed a black-and-white photo of the royal on its homepage after he died on Friday.

The website also displayed the statement that was released by Buckingham Palace on Friday.

"It is with deep sorrow that Her Majesty The Queen has announced the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh," the statement reads. "His Royal Highness passed away peacefully this morning at Windsor Castle."

"The Royal Family join with people around the world in mourning his loss," the statement adds.

William and Middleton are yet to make their own statement about the death of Prince Philip.

They changed their cover photo on Twitter to a photo of the duke, and also changed their profile picture to a black-and-white image of their royal monogram.

The Duke and Duchess of Sussex also paid tribute to Philip on Friday.

"In loving memory of His Royal Highness the Duke of Edinburgh," the couple posted on their Archewell website. "Thank you for your service ... You will be greatly missed."

Prince Harry and Meghan Markle's website previously contained information about their charitable foundation and their commercial deals with Netflix and Spotify. That information appeared to have been wiped and replaced with the tribute.