to ~1961 and this wonderful portrait of the Grimaldi family. Princess Grace’s fur pillbox is trimmed with a wonderfully prim bot and Prince Albert looks most dashing in a plaid cap.
Images from social media as indicated
Royal Hats
The Bold, Beautiful and Bizarre World of Royal Millinery
Royal Hats 
January 8, 1963: London
https://www.famousfix.com/post/jean-pierre-stora-grace-kelly-nadine-foster-pierre-grosz-33616456
How fun would it be if that cap Prince Albert is wearing was worn by Prince Jacques?
Goodness Princess Grace was so beautiful and chic. I love the unexpected bow on that fur pillbox.
My mom had the same hat. It was her pride and joy. Princess Grace had beautiful eyes!