KATE and William were the king and queen of green last night as they awarded the winners of a £50million planet saving prize.
The Duke and Duchess of Cambridge were joined by stars including Liverpool footballer Mo Salah, actress Emma Watson, and singer Ed Sheeran at the eco bash.
William, showing his environmental credentials by wearing a green jacket he has worn several times before, helped present the show and revealed next year’s ceremony will be held in the USA.
It means the Duke and Duchess could be heading Stateside — where Meghan and Harry have set up their new life.
Speaking at a reception afterwards, William said: “We raised the bar — now over to the US.”
Kate also kept the planet-saving theme in a dress Royal fans last saw at a Bafta event in 2011.
Guests had been told to “consider the environment when choosing their outfit” for the event.
Harry Potter actress Emma Watson, 31, wore a wedding dress made from ten frocks from Oxfam.
And none of the stars had flown to London for the event at Alexandra Palace, to make sure its carbon footprint was kept low.
The Duke and Duchess of Cambridge arrived in an electric Audi.
Kate announced the winner of the Protect and Restore Nature £1million prize was Costa Rica.
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She said: “Nature is vital to us all. A thriving natural world regulates our climate, nurtures our physical and mental health and helps feed our families.
“But for too long we’ve neglected our wild spaces and now we’re facing a number of tipping points.
“If we don’t act now, we will permanently destabilise our planet and we will rob our children of the future they deserve.”
Other stars included Emma Thompson, 62, and there was a performance by YouTube star KSI, 28. Wills was seen giving the thumbs-up several seats away to Brazilian footie ace Dani Alves, 38, as Ed Sheeran, 30, performed.
Coldplay played their latest single, powered by 60 cyclists.
The Earthshot prize, announced a year ago, is awarding £1million to five projects each year from now until the end of the decade.
Anfield attacker Mo Salah, 29, announced Coral Vita, of the Bahamas, which farms coral to restore dying reefs, was the winner of the Revive Our Oceans category.
Emma Watson revealed AEM Electrolyser, which creates green hydrogen, as winner of the Fix Our Climate section.
Emma Thompson awarded Milan the Build a Waste-Free World category prize after it took unwanted shop fruit and veg and handed them out to impoverished areas.
And actor David Oyelowo, 45, unveiled Takachar, in New Delhi, which is a system of burning agricultural waste and put a stop to the burning of crops, as winner of the Clean Our Air Earthshot.
Wrapping up the show, and revealing the prize will move to the USA, William told a star-studded audience: “What a night this has been. I hope everyone watching understands more about the urgent challenges facing our planet in this decisive decade.
“I want to say something to all the young people watching tonight.
“For too long, we haven’t done enough to protect the planet for your future. Earthshot is for you.
“In the next ten years we are going to act. We are going to find the solutions to repair our planet.
“Please keep learning, keep demanding change, and don’t give up hope. We will rise to these challenges.
“Now, I hope you agree, that London and the UK has put on quite a show for our first year.
“So for the second year, we need to pass the baton to a country whose leadership is essential for all five of our Earthshots.
“Where better than the nation that inspired the Moonshot all those years ago?”
On the green carpet, presenter Clara Amfo, 37, spoke about the William’s acting skills.
She said: “He has been really great company. I am sure you saw our advert and he was quite the actor.
“We took a few takes and he took considerably less.”
Co-host Dermot O’Leary, 48, said: “He is so disarming. He is doing an incredible job. It is easy not to stick his head above the parapet, but he is.”