Claude Saint-Cyr

For the French general and diplomat, see Claude Carra Saint-Cyr

Claude Saint-Cyr – sometimes Claude St-Cyr or Claude St. Cyr – (née Simone Naudet, 1911–2002) was a French milliner who worked in both Paris and London between the 1930s and 1960s, also establishing a worldwide reputation for her hats. She collaborated with many leading designers, including Jean Patou and Norman Hartnell.

She was a key supplier of hats to the royal household from the 1950s on. One of her most notable commissions was the 1960 wedding veil of Princess Margaret; at this event she also made hats for The Queen Mother and the Queen. After closing her own salon, she continued to act as an advisor to other design houses until the mid 1990s.