Queen Elizabeth has admitted her Coronation coach journey was "not very comfortable".
The 91-year-old monarch was crowned 65 years ago in the first televised Coronation, but she has recalled the Gold State Coach being "horrible" to sit in for two hours and four-and-a-half miles on the return journey to Buckingham Palace from Westminster Abbey.
She said: "Horrible, it's only sprung on leather. Not very comfortable."
Elizabeth has also admitted not everything about wearing crowns is a positive.
With a smile on her face, the queen said: "There are some disadvantages to crowns, but otherwise, they're quite important things."
The queen's Coronation was the second one she witnessed after she was at her father George VI's service.
Speaking in the US trailer of an upcoming BBC documentary, 'The Coronation' - which airs on Sunday (14.01.18) - she added: "I've seen one coronation and been recipient in the other, which is pretty remarkable.
"It's the beginning of one's life really as a sovereign.
The documentary will tell the story of the crown jewels and the ceremony of crowning a new monarch.
In the episode, Elizabeth will be talking to royal commentator Alastair Bruce about her own experiences with her Coronation.
Charlotte Moore, the BBC's director of content, said: "It is a real honour to have Her Majesty the Queen revealing her intimate knowledge of the Crown Jewels - and fond childhood memories from when her father was crowned King George VI in this very special film for BBC One.
"In her own words, the Queen will bring to life the enduring symbolic importance of the coronation ceremonies for modern audiences to enjoy."
'The Coronation' airs on BBC One on Sunday at 8pm.
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