Jaden Smith performed at the New York City climate strike.
Billie Eilish tweeted that "our time is running out" and that the "climate crisis is very real."
A note from Billie: “TICK TOCK! our time is running out. the climate crisis is very real. we need to speak up and demand that our leaders take action. #climatestrike #fridaysforfuture @greenpeace @gretathunberg”
Jane Fonda shared that she'd be speaking at the Los Angeles Climate Strike.
I’ll be speaking at the Student’s Climate Strike today in downtown LA. So proud of the adults in the room: OUR YOUTH
Gisele shared photos from the strike she was at.
Ellie Goulding called the strikes inspiring.
Wow. The Climate Strikes are SO INSPIRING 🙏🏼🙏🏼🙏🏼🤙🏼 So much admiration and respect for all of you x #Strike4Climate #ClimateAction @TheCCoalition
Chris Hemsworth shared a video from his local climate march and described the massive attendance as "coming out in droves like Children Of The Corn with far better intentions."
Ellen Degeneres tweeted her support for Greta Thunberg.
I see you, @GretaThunberg. I support you. #ClimateStrike @amnestyusa https://t.co/BmQ4OO1Bhe
Mark Ruffalo shared a video encouraging people to turn out at their local climate strikes.
Make no mistake, this is a climate emergency. Join us as we strike for #ClimateJustice & make our voices heard. Visit ➡️ https://t.co/OlWguYLYPP @usclimatestrike @100isNow @SolutionsProj @CJAOurPOwer #ClimateStrike
Malala was excited to see all the young women leading the climate movement.
I'm so happy to see that young women around the world are leading the climate movement. Thank you to girls like @GretaThunberg for using your voice, speaking truth to power — and encouraging other young people to do the same. 💕 https://t.co/e489ZiUHul
Lizzo shared a sign that used her lyrics for inspiration.
Whoopi Goldberg addressed the youth.
To all the young people marching around the world demanding action on climate change you can no longer be discounted because of your age & makes you a force to be reckoned with & 1 day YOU will be asked to vote prepare them for your opinion so they are not shocked by your vote
Ansel Elgort shared a fitting meme.
Julia Louis-Dreyfus suggested we "listen to the kids!"
Listen to the kids! Tell Congress there is NO room in government for climate deniers.Find a strike location near you: https://t.co/UAywPEasO3 #ClimateStrike @Fridays4future @GretaThunberg @NRDC
Kyra Sedgwick wore an appropriate t-shirt.
Here’s to ALL of our boots on the ground to demand climate justice for all of us. Let’s do everything we can to save our beloved Mother Earth. SHE NEEDS US AND OUR KIDS NEED US. @ProjectSunshine @NRDC @PlasticPollutes #ClimateStrike
Catfish host Nev Schulman brought his daughter to the march with a handmade sign that read, "The climate is changing, why aren't you?"
Inspired by all the kids marching today for their future. Climate Justice Now! #ClimateStrike
Lisa Ling shared her thoughts in all caps.
#climatestrike
John Legend announced that he'd be striking.
Young activists are challenging us to confront the realities of the climate crisis. Join me as I stand with @amnestyusa and @GretaThunberg today as we strike for climate. https://t.co/ND1321N5dJ #ClimateStrike #StrikeWithUs #AmbassadorOfConscience
Kerry Washington said she was "so in awe" of young activists and Greta Tunberg in particular.
It’s only going to get worse if we don’t act. I’m so in awe of young activists like @GretaTunberg who are challenging us to confront the realities of the climate crisis by taking a stand. I stand with you. @amnestyusa https://t.co/iPZKdy7mbk #ClimateStrike #StrikeWithUs https://t.co/evIItZD4qO
And George Takei was "so inspired" by Greta, too.
So inspired by Greta Thunberg's activism and the entire movement of young people who are participating and leading the #ClimateStrike. Are you striking today, friends?
Dan Rather made a case for acting on the climate crisis right now.
I think future generations may look back and consider denial and a failure to act on the climate crisis to be an impeachable offense. It is a threat to the health and security of our country, let alone the planet, as assuradly as a military force gathering on our borders.
Rob Delaney joined his local strike.
I just jumped into the #ClimateStrike march in Sheffield! Glorious.
Tom Morello attended the NY Climate Strike and shared one of his favorite signs.
HUGE #ClimateStrike Rally in NYC today. Perhaps the children can save us.
Maggie Gyllenhaal shared a photo from the London climate strike.
London climate strike!!! @FFF_USA @fffnyc @350 @GretaThunberg
Arsenio Hall spread the word.
GLOBAL #ClimateMarch today! Mostly young people and teenagers, like me!
Bette Midler encouraged people to "skip school and strike."
SKIP SCHOOL AND STRIKE! The ones with the most to lose take matters into their own hands since their elders are incapable, apathetic, or just plain stupid. https://t.co/1tFL2w1A6f
Piper Perabo shared a video encouraging people to strike.
Young people organizing TODAY’S #ClimateStrike are calling a #GreenNewDeal, respect of Indigenous land, #EnvironmentalJustice, protection of biodiversity & sustainable agriculture. Wherever you are #StrikeWithUS go to https://t.co/NVFJbjNlSo to find an event near you. ⚫️🌎
Sam Champion stated that his "heart is happy" after seeing all of the global strike images.
My heart is happy seeing ALL these people demonstrate their concern for a healthy planet 🌎 ❤️🙌 https://t.co/jpQG42imdb
The Dalai Lama shared his thoughts on the matter and suggested that "we need to listen to scientists."
It’s quite right that students and today's younger generation should have serious concerns about the climate crisis and its effect on the environment. They are being very realistic about the future. They see we need to listen to scientists. We should encourage them.
And Reese Witherspoon was inspired.
So inspired by these kids’ efforts to protect the environment 🌎 When youth takes matters into their own hands it’s a powerful thing! 🙌🏼@gretathunberg #FridaysForFuture https://t.co/0pntqk7jhZ