Dec 11, 2020 The Queen has already unveiled her impressive Christmas tree, but Royal fans are still noticing brilliant details about her festive decorations. After Prince William and Kate Middleton showed off their festive interiors update and admitted their Christmas plans were currently still up in the air, the pair enjoyed a royal engagement with the Queen. Max Mumby/IndigoGetty Images The Monarch was joined at the outdoor event at Windsor Castle by the Prince of Wales, Duchess of Cornwall, Duke and Duchess of Cambridge, The Earl and Countess of Wessex and The Princess Royal. And while the Royals were treated to a Christmas carol performance by the Regent Hall Band of the Salvation Army, it was the Queen's Christmas decoration that caught everyone's attention.