Hundreds of thousands of people from around the world gathered in 156 countries Sunday to raise awareness about climate change in the “People’s Climate March.”

In New York City, more than 300,000 people participated. Oversized puppets, street-wide banners, marching bands, labor unions and even some indigenous groups laced the streets of Manhattan hoping to bring attention to the issue. Among the eclectic crowd were several celebrities.

Leonardo DiCaprio
He’s the newly-designated “U.N. Messenger of Peace” for climate change.

Leonardo DiCaprio marches for climate change

Mark Ruffalo
Ruffalo marched with a clean-water group he supports, the “Waterkeeper Alliance.”

Mark Ruffalo joins the People's Climate March

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Jane Goodall, former Vice President Al Gore, Mayor Bill de Blasio and U.N. Secretary-General Ban Ki-moon
Gore tweeted out to his followers he was “proud” to be at the march, and encouraged people to “let their voice be heard” on a Climate Reality Project website.

People's Climate March, 092114

Sting
The musician, who marched with his wife Trudie, told a Democracy Now reporter he thinks “we need to really pull our resources to make sustainable energy a reality.”

People's Climate March in New York

Sting, Edward Norton, Mayor Bill de Blasio and an estimated 300,000 marchers attend the People's Climate March

Joseph Gordon-Levitt
The “500 Days of Summer” and “Inception” actor marched because he wants to “live a long and lustrous life.”

>>> A Memo to Leonardo DiCaprio on Climate Change

Edward Norton
Norton is also showing his support for climate action in a promotional video by the United Nations for its Climate Summit 2014.

Sting, Edward Norton, Mayor Bill de Blasio and an estimated 300,000 marchers attend the People's Climate March

Evangeline Lilly
The “Lost” actress posted pictures of her march on Instagram throughout the day. “It was a very powerful demonstration that could be felt all through the city,” she wrote.