KATE Middleton stunned in a recycled dress as eco-savvy Prince William wore a velvet green suit jacket again at the Earthshot awards this evening.

       The Duke and Duchess of Cambridge shone among throngs of famous faces gathered for the inaugural awards at Alexandra Palace in north London.

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       Prince William and Kate Middleton beamed as they walked the green carpet at the Earthshot Prize awards Credit: Goff 9

       Kate recycled a lilac gown with a gold beaded waistband Credit: ？Karwai Tang

       Kate recycled a lilac Alexander McQueen gown with a gold beaded waistband for the star-studded occasion. The dress was made for her in 2011.

       She previously wore the dress that same year for a sparkling BAFTA dinner at the Belasco Theatre in Los Angeles.

       Meanwhile her husband William followed suit, in a dark green velvet blazer he has worn before.

       The duke donned the statement piece for the Centrepoint 50th Anniversary Gala at the Roundhouse in London in 2019.

       He paired the bold jacket with black trousers and a black turtleneck.

       The Royals have been passionate when it comes to the environment, with William's father Prince Charles often leading the charge by promoting eco-friendly campaigns.

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       The Prince of Wales today said he was "very proud" of William's growing commitment to the environment.

       In a rare Tweet he urged the world to "come together to inspire, reimagine and build the sustainable future we so desperately need".

       William's Earthshot Prize takes its inspiration from the Apollo moon landings - nicknamed Moonshot - which helped advance mankind's technological achievements.

       It features five categories, or Earthshots - Protect and restore nature; Clean our air, Revive our oceans; Build a waste-free world; and Fix our climate - which organisers say if achieved by 2030 would improve life for all.

       Every year from 2021 until the end of the decade, winners of the five Earthshots will each receive ￡1 million to develop their projects.

       Earthshot judges include broadcaster Sir David Attenborough, actress Cate Blanchett and singer Shakira.

       Ed Sheeran, Coldplay and KSI will perform during the ceremony, and actors Dame Emma Thompson, Emma Watson and David Oyelowo, and Liverpool FC striker Mo Salah, will be handing out the awards.

       The ceremony comes ahead of the Cop26 UN climate change conference in Glasgow in a few weeks - which the Queen, the Cambridges and the Prince of Wales and Duchess of Cornwall will attend.

       In the days leading up to the ceremony, William criticised space tourism, saying: "We need some of the world's greatest brains and minds fixed on trying to repair this planet, not trying to find the next place to go and live."

       And his brother Harry, 37, shared his own plea from across the pond to "stop pillaging" his African "sanctuary" for oil earlier this week.

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       The Duke and Duchess of Cambridge shone among throngs of famous faces Credit: PA 9

       She previously wore the dress back in 2011 for a sparkling BAFTA dinner Credit: Getty 9

       The duke donned the statement blazer for the Centrepoint 50th Anniversary Gala at the Roundhouse in London in 2019 Credit: Splash News 9

       Kate looked like she was floating on air in the light purple number Credit: James Whatling 9

       Emma Watson looked elegant as she walked the carpet Credit: Getty 9

       Emma Thompson cut a stylish figure in blue Credit: Getty 9

       Dermot O'Leary and Dee Koppang also opted for suits Credit: Getty

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