Academy Award–winning actor and environmentalist Leonardo DiCaprio continued his work on the latter this weekend and took it back to activism basics. The superstar was spotted amongst the masses participating in a climate change march in Washington, D.C.

The normally private DiCaprio couldn't count him self out of the People's Climate March on April 29. Photos that he later shared on his Twitter account show the actor grasping a makeshift sign (written on the back of a manila folder) that reads "Climate Change Is Real!" in colored marker, and holding hands with Native Americans in a display of solidarity. DiCaprio also shared several tweets leading up to and after the event. "Tomorrow, I march for climate justice and to protect our right to a healthy future. Join us. #ClimateMarch," he wrote, sharing a link to the march's website. Following the march, he tweeted: "Today's #ClimateMarch leaves me inspired & hopeful for our future. We must continue to work together and fight for #climatejustice."

More than 300,000 people came out across the country for the People's Climate March, which was held on the 100th day of President Donald Trump's presidency. The event was planned as a "a powerful demonstration of unity for jobs, justice, and climate action" — the last of which has been threatened by several of the newest administration's policies.

Jose Luis Magana/AFP/Getty Images
JOSE LUIS MAGANA/AFP/Getty Images
JOSE LUIS MAGANA/AFP/Getty Images

DiCaprio's participation in the People's Climate March is his latest work in support of the environment. Though he has nearly two decades of climate change activism under his belt, most recently the actor was the subject of the call-to-action 2016 documentary Before the Flood, which followed him on a three-year journey visiting 10 different countries to examine the ramifications of global warming. DiCaprio also used his Oscars acceptance speech that same year to raise awareness for the threats of climate change. "Climate change is real. It is happening right now," DiCaprio said at the time. "It's the most urgent threat facing our entire species and we need to work collectively together and stop procrastinating."

Related: Leonardo DiCaprio's Climate Change Documentary Is Surprisingly Moving

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