George Clooney and his wife, Amal, at the October premiere for “Suburbicon” in Los Angeles.

The actor George Clooney and his wife, Amal, a human rights lawyer, said Tuesday that they would donate $500,000 to a nationwide protest against gun violence planned next month by teenage survivors of a Florida high school shooting, inspiring similar gifts from other big-name Hollywood figures.

In a statement, the couple said they were “so inspired by the courage and eloquence of these young men and women” from Marjory Stoneman Douglas High School in Parkland, Fla. The police say the suspect — a 19-year-old former student, Nikolas Cruz — killed 17 people in a rampage with a semiautomatic weapon there last week.

“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,” the Clooneys said. “And in the name of our children, Ella and Alexander, we’re donating 500,000 dollars to help pay for this groundbreaking event.”

“Our children’s lives depend on it,” they added.

The survivors of the Stoneman Douglas school…