Melania Trump says she has been "heartened" to see children "across this country" speaking out after the deadly shooting at a Florida high school.

The first lady says children are the future and "they deserve a voice."

Mrs. Trump commented Monday at a White House lunch for spouses of the nation's governors, who are in Washington for their annual meeting.

The first lady says that she can't imagine the kind of grief a tragedy like that brings. She and the president have an 11-year-old son, Barron.

Read more: Analysis: Why Parkland students have emerged as a powerful political voice

She wasn't the only major public figure to commend vocal students in recent days.

Oprah Winfrey has nothing but praise for the Florida school shooting survivors who have channeled angst into activism, calling them "warriors of the light" and comparing them to civil rights pioneers.

In an interview with The Associated Press on Saturday, Winfrey drew parallels between the teens and the Freedom Riders of the 1960s, who rode buses into southern states in protest of racial segregation. Winfrey called the Parkland students' protests for gun control "a proud moment."

"It's an evolving moment for our country. The same thing happened, as you know, back in the '50s and '60s for the civil rights movement," Winfrey said. "Young people said, 'We will not tolerate what our ancestors have tolerated. We have had enough and we're willing to fight for it and willing to march in the streets for it and, if necessary, die for it.'"

Read more: Demands for action intensify at huge rally at Florida's Capitol

Winfrey spoke while promoting the upcoming film "A Wrinkle in Time," directed by Ava DuVernay and featuring her, Reese Witherspoon and Mindy Kaling. The film is adapted from Madeleine L'Engle's science-fiction fantasy novel.

"These young people get to be literally warriors of the light," Winfrey said. "That's what they're trying to do. They're trying to — through their voices, through the March For Our Lives — say 'We will not let this happen again. We are going to do what we can to banish the darkness.'"

The former talk show host last week matched a $500,000 donation by George and Amal Clooney to the students' planned marches, including one on March 24 in Washington, D.C.

The Feb. 14 mass shooting at Marjory Stoneman Douglas High School that left 17 people dead has sparked calls for walkouts, sit-ins and other actions on school campuses across the U.S.

Read more: Florida lawmakers have two weeks to do something about guns. Here's what's possible.