Royal Family is marking an annual event on the royal calendar!On Tuesday, November 18, King Charles and Queen Camilla hosted a reception for members of the Diplomatic Corps at Windsor Castle.Prince William also joined Their Majesties at the event. However, his wife Kate Middleton missed out the celebration for the second year in a row due to an unknow reason.During the event, King Charles and Queen Camilla welcomed over 900 members of the Diplomatic Corps and met representatives of countries accredited to the Court of St. James.The King and Queen were both dressed to the nines for the reception, with the monarch wearing a tailored tuxedo and Camilla exuding glamor in a floor-length white satin gown.Queen Camilla paired her ethereal gown with the Greville Emerald Kokoshnik Tiara, which features diamonds on the band with a large emerald.The reception – which traditionally takes place at Buckingham Palace, was held at Windsor Castle for the first time since 2001.The Diplomatic Reception is an annual event hosted by the sovereign and is organized to recognize the members of the Diplomatic Corps in London, one of the largest in the world.Earlier in the day, Kate Middleton – who last attended the Diplomatic Reception in December 2023 – made a solo appearance at The Future Workforce Summit in London.