Oprah Winfrey tweeted Tuesday that she was joining George and Amal Clooney in supporting the pro-gun control “March for Our Lives” to be held in Washington, D.C., next month.

“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,’” Winfrey tweeted.

The Clooneys said earlier Tuesday that they would be donating half a million dollars to the event and personally participating in the march on March 24.

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“Amal and I are so inspired by the courage and eloquence of these young men and women from Stoneman Douglas High School,” George Clooney told ITK in a statement Tuesday, referring to the school where a gunman killed 17 and injured many more last week.

The march’s website states that the event is to demand that children's “lives and safety become a priority and that we end gun violence and mass shootings in our schools today.”

Winfrey emerged as a possible 2020 presidential candidate after she delivered an emotional speech at the Golden Globes earlier this year, speaking out against sexual harassment.

She has denied that she is considering a bid, saying it isn't in her character.

President TrumpDonald John TrumpOver 100 lawmakers consistently voted against chemical safeguards: study CNN's Anderson Cooper unloads on Trump Jr. for spreading 'idiotic' conspiracy theories about him Cohn: Jamie Dimon would be 'phenomenal' president MORE went after Winfrey on Twitter Saturday, calling her “very insecure” and saying that he hopes “Oprah runs so she can be exposed and defeated just like all of the others!”