Leonardo DiCaprio took a stand to help protect the Earth.

The 42-year-old actor was seen marching in the People’s Climate March with fellow protestors on Saturday (April 29) in Washington, DC.

“Honored to join Indigenous leaders and native peoples as they fight for climate justice. Join me in standing with them. #ClimateMarch,” Leonardo wrote on Twitter before the march. “Today’s #ClimateMarch leaves me inspired & hopeful for our future. We must continue to work together & fight for #climatejustice,” he added later.

After the march, Leonardo was seen at the airport heading out of town.