The royal family may be steeped in history and tradition, but it's ahead of the curve when it comes to being green.
Prince Charles's eco-warrior status is well documented. A keen advocate of sustainable living, he hosted a 12-day garden party last summer to promote it.
So it's no surprise the green revolution has spread to his son. Prince Will and Kate have already made "green" part of the planning of their upcoming wedding.
ABC News spoke to marine scientist and former "eco-bride" Stephanie Wear to get some tips.
"I've been really excited to hear about the possibility of a green wedding for Wlliam and Kate," said Wear. "We're hoping that they will make visible green choices in their wedding which will inspire others to do the same."
It started with the proposal: Will popped the question at a safari reserve in Kenya.
And it's spreading to the wedding: the lucky guests are being asked to donate to charity instead of buying wedding gifts.
"This is a great move because so many wedding presents are unwanted and end up in a landfill," says Wear.
"There are so many eco-charities to choose from; the 'Adopt a Coral Reef' program, for example, helps to protect threatened habitats."
"What you put in your mouth has become a political act," Wear told ABC News. "The cake is a huge symbol of the mood of Will and Kate's wedding."
Wear herself got married on St. John, in the U.S. Virgin Islands. She strongly encourages making the most of your natural surroundings.
"You can use the natural beauty of a location over spending lots of money on decorations and flowers," the eco-bride told ABC News.
"There are two and a half million weddings each year in the U.S. alone. If you just make one green choice, that's two and a half million greener choices a year."
"You don't have to go all or nothing," says Wear. "People don't want to sacrifice this special day, but you can make a difference."
"Greener is often cheaper too, which makes sense!"
Visit The Nature Conservancy for 10 tips on how to make your wedding as green as it is white.