Kate Middleton may not wear a tiara at King Charles and Camilla's coronation.

The event is to be modernized with a more low-key atmosphere.

Parliamentarians have also been asked to dress less formally.

This is part of the de-formalising of the British royal world.

Tiaras were worn at the Queen's coronation in 1953.

Camilla will wear Queen Mary's Crown with modifications.

Charles will wear the St Edward's Crown for his coronation.

He will later wear the Imperial State Crown.

The event is expected to be a blend of tradition and modernity.