Kate wore on old favourite coat from the event, which took place in the freezing come on Monday evening. She wore a green coat by Catherine Walker.
The royals have worn less fur as the years have gone on. This is not thought to be for any particular reason, other than the fact that views have changed on the ethics of fur.
The Queen went so far as to ban fur from her wardrobe last year.
Her Majesty’s dresser shared the news on her memoir The Other Side of the Coin: The Queen, the Dresser and the Wardrobe.
Kelly who dressed the Queen for 25 years, wrote: “If Her Majesty is due to attend an engagement in particularly cold weather, from 2019 onwards fake fur will be used to make sure she stays warm.”
Buckingham Palace confirmed the news with a statement that read: “As new outfits are designed for the Queen, any fur used will be fake.”
However, it’s not clear what will happen to the Queen’s existing fur, or if she will still wear it.
To her look on Monday night, Kate added an item from another favourite brand, Alexander McQueen.
She carried a small black clutch from the brand with a bejewelled handle.
Kate also wore the Queen earrings, a pair she has on a long term loan.
Unlike some royal jewellery, however, these pieces’ provenance has never been revealed.
They have never been seen before 2012 when they were worn by the Queen, leading it to see likely they are a new acquisition for the Monarch.