Prince of Wales joined by star-studded guests Heidi Klum and Winnie Harlow at Earthshot Prize in Cape Town

e-mail

Prince William was joined by a coterie of big names at his Earthshot Prize in Cape Town, South Africa.

Heidi Klum and Winnie Harlow led the glamour on the green carpet ahead of the prestigious eco-awards ceremony which was held in a reusable eco 'super dome'.

Prince William looked dapper in a gray chequered blazer, blue shirt and navy pants, complete with eco-friendly white sneakers as five winning organizations were celebrated for their environmental initiatives chosen from nearly 2,500 nominees across 75 countries.

Check him out! Prince William is pictured at the Earthshot Prize Awards looking suave in a gray blazer

Meanwhile, Heidi wowed in a one-shouldered tangerine dress as she posed on the green carpet.

Winnie turned heads in a chocolate-brown ensemble, teaming a leather turtleneck top with a fishtail skirt.

She said: 'I was really honored to get a royal letter asking if I could come here.

'I feel this should be something near and dear to everyone's heart when it comes to taking care of Mother Earth, the planet. I always think it's an honor.'

Talking of William's involvement as a member of the British royal family, Winnie added: 'I think it's important for everyone to get involved just especially when you have got eyes on you.

'You want to help focus a lot of eyes on things that are important to everyone.'

Tangerine dream: Heidi Klum looked effortlessly fashionable in a bold one-sleeved frock

Swish star: Winnie Harlow showed off her chocolate fishtail skirt, slick top and matching accessories

Prince William said the Princess of Wales is 'doing really well' and that she and their children will be watching his Earthshot Prize environmental awards tonight.

The royal paid tribute to wife Kate on his trip to Cape Town, saying she had been 'amazing' during her tough year of cancer treatment.

'She's doing really well thanks. And…hopefully she is watching tonight. So cheering me on. She's been she's been amazing this whole this whole year. I know she will be really keen to see tonight be a success.'

With the bandeau: Canadian actress Nina Dobrev turned heads in a red strapless number

Mellow in yellow: Earthshot Prize Ambassador and Host of Earthshot Week, Nomzamo Mbatha looked glamorous in a strapless pastel yellow frock

William was speaking to the BBC and Sky News as he prepared to host his fourth annual Earthshot Awards designed to highlight and scale up the best solutions on the planet to the current environmental crisis.

He said that he and his family, like so many, have conversations about trying to 'do what they can' at home.

William said: 'Yeah, well, you know, every family tries to do what they can to sort of help with the environment.

'We go through all the basics of recycling and making sure we minimise water use and turning off lights when we leave the house and stuff like that.

'I think every family has these conversations. You just try to do what you can. '

Wild smile: The son of the late Steve Irwin, Robert Irwin, an Australian conservationist, stepped out in a crisp tuxedo

Group photo: Prince William posed next to Robert Irwin and Nomzamo Mbatha

William added: 'The Earthshot prize has got to be a bit more global than that. We are trying to do big scale ambition and big scale business to tackle some of the solutions.

'But I brought the children along that journey and tonight I hope they are watching and they are proud of kind of what we are try to do here, which is to really galvanise that energy that enthusiasm to make real impact.'

He also spoke about the friendship bracelet he has been seen wearing bearing the word 'Papa' on, made for him by his daughter Princess Charlotte, which he has 'promised' not to lose.

'Well, this is….a relic, if you like, from a Taylor Swift concert that my daughter decided that she wanted to create a bracelet for. She gave it to me when I came away. So I promised that wear it and try not to lose while I was out here.'

Starry selfie: The Prince of Wales poses for selfies with Heidi Klum, Nina Dobrev, Tobe Nwigwe and Tendai Mtawarira and Winnie Harlow

Splash and dash: American actor and singer Billy Porter looked stunning in a monochrome suit

William was infectious in his enthusiasm as he spoke about Earthshot, which he brought for the first time to Africa this year.

Five winners from across the world received $1.3m in prize money to develop and scale up their solutions to environmental and climate change issues in a glitzy ceremony which was broadcast live across Africa and later on BBC iPlayer.

These winners include Advanced Thermovoltaic Systems, High Ambition Coalition for Nature and People, Keep IT Cool, Altyn Dala Conservation Initiative and the Green Africa Youth Organization (GAYO).

Ahead of announcing the winners, Prince William said: 'I've been greatly looking forward to the time I can bring Earthshot to Africa. I love this continent.

'And spent many a year looking around exploring it. And just really thrilled to have the reception of the exuberance and energy that's going to be in this room tonight around Earthshot in South Africa. '

Asked about how he could ensure his message lands in a sometimes tough political climate for the environment, he added: 'I think everyone wants some hope and wants some optimism. I think the Earthshot encompasses urgent optimism. That's what we're here for.'