Kate Middleton accessorises a rented dress with Princess Diana's necklace for the Earthshot Prize Awards in Boston

The rented gown reflected the event's theme of environmental consciousness

Kate Middleton
(Image credit: Mike Coppola/Getty Images/Future)

Kate Middleton stunned in a rented dress at the Boston award ceremony for Prince William's Earthshot Prize last night, and many eagle eyed royal fans noticed her necklace once belonged to Princess Diana

Prince William and Kate Middleton's long-awaited three-day Boston trip came to an end last night as the pair attended the visit's finale event - the 2022 Earthshot Prize Awards ceremony.

The Earthshot Prize competition was founded by William in 2020 with the intention to celebrate and support entrepreneurs working to create solutions for environmental issues. There are winners in five different categories; Nature conservation and protection, Air quality, Ocean revival, Waste-free living, and Climate action.

Kate Middleton

(Image credit: Mike Coppola/Getty Images)

While the ceremony focused on the Earthshot Prize nominees and winners, Kate Middleton demanded rightful attention in a stunning green gown designed by Solace London. The dress embraced the event's theme of environmental consciousness, not just thanks to its colour, but because the Princess rented the piece as a more sustainable option to buying it.

The gown also came at a bargain price, with British clothing rental company Hurr renting the piece for a very reasonable £74.

Kate accessorised the dress with a piece of jewellery from the royal vaults. The emerald choker, known as Queen Mary’s Emerald Choker Necklace or The Cambridge Emerald Choker, was famously worn by her mother-in-law, the late Princess Diana.

Princess Diana necklace

(Image credit: Tim Graham Photo Library via Getty Images)

The 2022 Earthshot Prize awards ceremony will air at 17:30 on Sunday the 5th of Decemeber on the BBC in the UK, and on Monday in the US. The ceremony will also be available to watch on Youtube.

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Charlie Elizabeth Culverhouse
Royal News and Entertainment writer

Charlie Elizabeth Culverhouse is royal news and entertainment writer for Goodto.com. She began her freelance journalism career after graduating from Nottingham Trent University with an MA in Magazine Journalism, receiving an NCTJ diploma, and earning a First Class BA (Hons) in Journalism at the British and Irish Modern Music Institute. She has also worked with BBC Good Food and The Independent.