Sir David Attenborough, US President Barack Obama and Hollywood star Leonardo DiCaprio top people's wishlists for their dream dinner guests, a poll suggests.
A survey ahead of WWF's Earth Hour, when people and landmarks across the world turn the lights off for an hour to show they care about the future of the planet, found eminent conservationist Sir David was the most popular choice for a dinner party.
The US President was the second most popular diner in the poll, which asked people to select 10 dream dinner guests from a list of 100 possible figures - both living and dead - ranging from Mother Teresa to Kim Kardashian.
Other popular dream dinner guests included David Bowie, Nelson Mandela, Adele, Prince Harry, Albert Einstein, William Shakespeare, Elvis Presley and John Lennon.
For those aged 16 to 25, Oscar-winning actor and committed environmentalist DiCaprio was the top choice, followed by Harry Potter star and equality campaigner Emma Watson.
Young people were also keen to sit down to dinner with Beyonce, Jennifer Lawrence, Adele, Rihanna, Mr Obama, Daniel Radcliffe, Taylor Swift and Shakespeare.
WWF-UK are promoting the option of a candlelit meal with family and friends during Earth Hour, from 8.30pm to 9.30pm Saturday night, and have teamed up with top chefs to invite Britons to enjoy a sustainable dinner in the dark as they back the environment.
Chef Hugh Fearnley-Whittingstall said: "The food we eat - and the way it is grown and transported - has a huge impact on our planet.
"There are many things we can do to make that impact more positive - opting for local and seasonal foods, for instance, or eating less meat.
"A candlelit meal enjoyed during Earth Hour is a fantastic opportunity to consider some of these changes - and of course, to really focus on the food you're eating, and the person you're sharing it with."
Along with many restaurants across the UK which are hosting candlelit dinners, 350 landmarks in 178 countries and territories will switch off their lights for the hour, including London's Palace of Westminster and Big Ben, the Eiffel Tower in Paris, New York's Empire State Building and the Sydney Opera House.