Nearly a week after the Valentine’s Day shooting at a Parkland, Florida, high school, George and Amal Clooney have announced they will participate in The March For Our Lives on March 24 and have donated $500,000 to the group.

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The celebrity couple made the announcement in a statement from George Clooney. People reported the donation was made in the name of the couple's 8-month-old twins Ella and Alexander.

“Amal and I are so inspired by the courage and eloquence of these young men and women from Stoneman Douglas High School,” Clooney said in a statement. “Our family will be there on March 24 to stand side by side with this incredible generation of young people from all over the country, and in the name of our children Ella and Alexander, we’re donating $500,000 to help pay for this groundbreaking event. Our children’s lives depend on it.”

Related: Gabrielle Union, Kim Kardashian, more celebs call for gun control after Florida school shooting

On Tuesday afternoon, Oprah Winfrey said she would match the Clooney's donation.

“George and Amal, I couldn’t agree with you more,” Winfrey tweeted. “I am joining forces with you and will match your $500,000 donation to ‘March For Our Lives.’ 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.”

The March for Our Lives event was announced by Students David Hogg, Alex Wind, Cameron Kasky, Jacqueline Coren and Emma Gonzalez, five survivors of the Marjory Stoneman Douglas High School shooting. On Feb. 14, 19-year-old Nikolas Cruz opened fire at the school, killing 17 people.

Related: Florida school shooting timeline: Seven minutes, three floors and 17 dead

Cruz has been charged with 17 counts of premeditated murder.

The March For Our Lives march will be in Washington, D.C. According to the group's website, "the kids and families of March For Our Lives will take to the streets of Washington DC to demand that their lives and safety become a priority and that we end this epidemic of mass school shootings."