The Queen reunites with Duchess Kate, Prince William and three of her children for carols session at Windsor Castle

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The Duke and Duchess of Cambridge making marshmallows during a stop in Cardiff on their royal train tour on Dec. 8. 2020. 
<p>Photo: © JONATHAN BUCKMASTER/POOL/AFP via Getty Images

The Queen reunites with Duchess Kate, Prince William and three of her children for carols session at Windsor Castle

The Duke and Duchess of Cambridge making marshmallows during a stop in Cardiff on their royal train tour on Dec. 8. 2020.
<p>Photo: © JONATHAN BUCKMASTER/POOL/AFP via Getty Images