Kate Middleton, who is celebrating her 43rd birthday on Jan. 9, has proven herself to be the shiniest jewel of the British monarchy. The princess is married to Prince William, heir to the throne.

Reports have emerged that Prince William is stepping into his role as heir apparent amid his father King Charles' ongoing health struggles.

Prince William has broken royal tradition with a "powerful statement" to Princess Kate, according to a royal historian. The future King released the statement alongside a photo of Catherine on the Prince and Princess of Wales's joint social media account.

Prince William ‘seizing’ power from cancer-stricken King Charles. The Prince of Wales has declared his own brother, Prince Harry, sister-in-law Meghan Markle, and disgraced un

William, who is next in line to become king, is said to be putting his foot down on several key decisions about the Firm's future.