Prince William, Kate Middleton & Emma Watson Sparkle On The Red Carpet While Attending The Earthshot Prize Awards Ceremony — Pics

Glitz and glamour! Prince William, Kate Middleton and Emma Watson looked like superstars when they made an appearance at the Earthshot Prize Awards ceremony on Sunday, October 17.

The event was very important to the prince, as he began the initiative — which is "designed to incentivize change and help to repair our planet over the next 10 years," the website states — not too long ago.

Scroll through the gallery below to see more photos!

The Harry Potter alum attended her first red carpet since 2019, wearing a unique recycled outfit.

The actress also posted on Instagram about the important event.

"Taking inspiration from President John F. Kennedy’s Moonshot, this new environmental prize aims to incentivize change and help repair the planet. The awards are centered around five ‘Earthshots’ — goals to improve life for generations to come. The winners of the Fix Our Climate award was the Enapter team behind the AEM Electrolyser, which turns renewable electricity into emission-free hydrogen gas, heats homes, and fuels essential industries. Enapter was co-founded by the formidable Vaitea Cowan, who experienced the impacts of climate change first-hand growing up on a Pacific Island. She believes green hydrogen can change the way we power our world. Her personal mission is protecting her family by providing clean energy independence to Polynesia and beyond," a caption read via Instagram.

The message continued, "As Vaitea says, 'The world needs many solutions to fight climate change. Our biggest enemy is time.' Hopefully these awards will help take these solutions to scale — and fast. Thank you to ALL the innovators, activists, academics, and advocates for educating us. Whether that be through resisting corporate greenwashing and land grabbing, or inventing technologies to safeguard the survival of species across the world, (including our own) your work is unbelievably important.Extra special love and appreciation to the kindest @harris_reed and team. We LOVE you! Your push for gender fluidity and acceptance is beautiful, vibrant, and vital. Your goal to make fashion less harmful is so inspiring.🌎🌍🌏Emma was dressed in an up-cycled wedding dress from the FOUND collection created in partnership with @oxfamgb Props to all the crew ensuring this was a carbon neutral production and broadcast, with a zero waste to landfill approach, including set design and staging.#EarthshotLondon2021🌍Thank you @earthshotprize and @dukeandduchessofcambridge and @teddysphotos and @shawnmendes."

The brunette beauty looked stunning in an Alexander McQueen dress — the same one she wore 10 years ago! Meanwhile, William donned a velvet green suit.

"The Earthshot Prize is a global environment prize, trying to inspire positivity and solutions to tackle some of the world's biggest environmental challenges," he said. "So, the inspiration to create is going back to going around the world. I have seen some amazing places and some amazing people who are doing incredible work. I think this sort of prize needs to be highlighting those individuals, give them a profile to present their solutions and show people we can actually fix this stuff. Ultimately, I want my children's future to be better than we currently have at the moment."

"I think a prize is going to help climate change because we need the hope, we need the optimism right now. It can feel very depressing when we think about how big these problems are, but I think right now what is missing is the prize — it's this sense of hope, it's this sense of optimism that we can actually fix stuff," he continued.