At Prince William's birthday party, Kate was ignored, revealed by royal butler Grant Harrold.

William and Kate met at St Andrews University in 2001.

They dated for around 10 years before marrying in 2011.

They have three children: George, Charlotte, and Louis.

After Queen Elizabeth II's death, William and Kate became the Prince and Princess of Wales.

They retain their Cambridge titles and inherit the Cornwall titles.

William is now first in line to the throne, with George as second in line.

The royal butler sees William and Kate as a regular couple, in love and enjoying each other's company.

The butler considers it a privilege and honor to be around the brilliant and great fun couple.