Oprah Winfrey and Steven Spielberg have joined a growing list of Hollywood celebrities to follow George and Amal Clooney in donating to the upcoming “March for Our Lives” gun control rally led by student organizers in the wake of the deadly shooting at Marjory Stoneman Douglas High School in Parkland, Fla.

“George and Amal, I couldn’t agree with you more. I am joining forces with you and will match your $500,000 donation to ‘March For Our Lives,’” Oprah said on Twitter Tuesday evening. “These inspiring young people remind me of the Freedom Riders of the 60s who also said we’ve had ENOUGH and our voices will be heard.”