Celebrities are weighing in on the Texas shooting at an elementary school.

One teacher and 14 students were reportedly killed by an 18-year-old gunman.

Author Stephen King tweeted, “2-day Twitter outrage doesn’t cut it.”

“Seinfeld” actor Jason Alexander asked, “When will we stop the madness?”

NBA star LeBron James tweeted, “There simply has to be change! HAS TO BE!!”

Actress Lynda Carter asked, “How many times will our nation’s children have to suffer unconscionable violence?”

Jimmy Kimmel tweeted, “…but you can’t have a beer until you’re 21.”

George Takei called out Ted Cruz: “Their blood, your hands.”

He asked for followers to vote for gun control: “If you sit this out, they’ll continue to die senselessly.”