Catherine Elizabeth Middleton married the newly enobled HRH The Duke of Cambridge at Westminster Abbey on 29 April 2011.
She was presened the Royal Family Order of Elizabeth II in 2017 and first wore the size two badge to the Diplomatic Corps reception at Buckingham Palace in December 2017.
Her badge is painted on glass, instead of the traditional ivory. Perhaps setting the trend for the future
The later recipients of the Royal Family Order of Elizabeth II were:
1961 - The Duchess of Kent (wife of HM's Cousin)
1969 - The Princess Anne, later Princess Royal (daughter of HM)
1973 - Princess Richard of Gloucester, later Duchess of Gloucester (wife of HM's cousin)
1982 - The Princess of Wales (wife of HMs eldest child)
2004 - The Countess of Wessex, later Duchess of Edinburgh (wife of HM's youngest child)
2007 - The Duchess of Cornwell, later Queen Camilla (second wife of HM's eldest child)
2017 - The Duchess of Cambridge, later Princess of Wales
Size one badge, belonging to Queen Mary, later worn by Princess Margaret.
Size two badge presented to HRH Princess Alice Duchess of Gloucester at Christmas 1952.
The badge design followed the format of King George VI's Family Order. However, the 18 brilliants were in six groups of three, each divided by a baguette. The portait of the Queen wearing the George IV diadem and the Cartier necklace from the Nizam was based upon a photographic portrait by Dorothy Wilding.
"Her Majesty The Queen's Family Order, again made by Garrards, was bestowed by her at Christmas 1952 on ladies of the Royal Family. Subsequently it was given to some who had married into the Royal Family and to the Princess Royal, for whom a new badge was made in 1969."
Patterson, Stephen (1996). Royal Insignia: British and Foreign Orders of Chivalry from the Royal Collection. London: Merrell Holberton. p. 142. ISBN 9781858940250 .