George Clooney is using his global profile to support the teenage victims-turned-activists from Parkland, Florida, who are fighting for gun restrictions following the devastating February school shooting that killed 17 and wounded 17 more.

Via an open letter to the students in The Guardian, Clooney ensured the world will continue to watch as they push for change.

“Amal and I are 100% behind you and will be marching in [Washington] DC on the 24th, but we both feel very strongly that this is your march. Your moment,” he wrote.

“Young people are taking it to the adults and that has been your most effective tool,” he continued.

“The fact that no adults will speak on the stage in DC is a powerful message to the world that if we can’t do something about gun violence then you will. The issue is going to be this, anyone you ask would feel proud to be interviewed by you but it’s so much more effective if it’s young people.”

The actor, married to human rights lawyer Amal, concluded on a powerful note:

“Amal and I stand behind you, in support of you, in gratitude to you. You make me proud of my country again.”

Thousands of students and their supporters will take to the streets across the US on March 24 for March For Our Lives, a protest against gun violence.