Celebrities: just like the rest of us. Drivers to zip them around, chefs to maintain their abs and a propensity to 2am prang outs about the future of the planet.
From Leonardo DiCaprio's environmentalist documentary, 2016's Before The Flood, to Lily Cole's campaigning work around sustainability in the fashion world, starry names are leading the green fight.
Here's some of the finest.
Avery public advocate of veganism, she feels strongly about "practices aligning with principles" when it comes to the treatment of animals.
The Harry Potter star made a speech at Dublin's Trinity College, stating that one of the key contributors to greenhouse gas emissions is animal agriculture, and that the issue needed to be addressed.
At London Fashion Week's Men's show, she stuck rubbish to her models to make a statement about climate change and recycling, as well as employing Mic Righteous to rap about climate change on set. She also took advantage of the opportunity to use nature to convey beauty, by using rose petals as lip colour.
She spoke out at the show about the increasing problem of wastage in fashion: "My message is 'buy less, choose well, make it last."
With model friend Katherine Poulton, she formed The North Circular in 2009, a knitwear company with an ethical mission. All products are knitted by "talented grandmothers, girls and a few strong men", made from rescued Wensleydale sheep wool and produced locally in the UK within the north circular route of Scotland.
Shealso believes in "the power of purchasing choices" and the importance of knowing where what you're buying is coming from, and she also encourages ethical social enterprise. She set up her own business and altruism-based social network called Impossible in 2013.
She is the face of a campaign to save a billion trees in the Amazon, and has recently launched a line of Veja trainers, which consist of Amazonian rubber soles, to aid the cause.
An Oxfam Global Ambassador, Firth founded the "Green Carpet Challenge" in 2010, asking the world's top designers to bear in mind eco-friendly materials and sustainability while designing the most sought-after pieces of the fashion industry. She has attended all red carpet events in sustainable outfits since 2009's Golden Globes.
Prior to this, she set up her own eco-consultancy business with her brother in 2008.
She feels really strongly about the high levels of wastage in the fashion industry: "Onceyou've seen how a factory producing throwaway fashion operates, you can never really go back to the high street."
The co-founder of grime collective Boy Better Know is vocally engaged in politics and environmental issues and his self-proclaimed "VGang movement".
A proud plant-based vegan, JME starred as himself in Simon Amstell's Carnage: Swallowing the Past earlier this year, a film imagining a future where all younger generations are vegan and older generations must `atone for their carnivorous ways.
Using her platform as one of the most famous child actresses of all time to speak out about environmental issues, Emma is known for turning heads. Most notably, at the 2016 Met Gala she wore a custom-made gown made from recycled plastic bottles, a joint project between Calvin Klein and Eco-Age.
She spoke out in support of People Tree sustainable fashion, saying: "I don't want to wear something on my body that hurts the environment or the people in it. It's hard to know what is good and what is bad on the high street and equally hard to find fashionable or youthful ethical clothing. It shocks me that even today only 1% of cotton produced in the world is Fair Trade and organic."
Sheis an ambassador for The Dolphin Project, an organisation formed to stop the capture and killing of dolphins for marine shows and their meat. Most recently she has raised awareness of dolphin roundups in Japan.
At a protest in March against dolphin hunting, she told The Independent: "There are so many ways to get in touch with animals in the wild, in their natural habitat. The fact that we think putting them in tanks is good for anyone is just nonsense, really."