Ava Gardner wears a tiara for the Primrose League’s Coronation Ball at the Dorchester Hotel in London, June 1953; I don’t have any additional information about the tiara

Audrey Hepburn wears her tiara for the premiere of A Nun’s Story in London, 1959; more on the sparkler, which was sold in 2017, over here!

Elizabeth Taylor wears the diamond tiara given to her by her husband, Mike Todd, at the Cannes Film Festival, August 1957; more on the tiara over here!