In the wake of Sunday night’s mass shooting that killed at least 58 people in Las Vegas and injured hundreds more during a country music concert, entertainment figures are begging the government to enact stronger gun control laws.

Joss Whedon tweeted a link to support Everytown for Gun Safety, an advocacy group backed by Michael Bloomberg, among others. Julianne Moore, Marti Noxon, Amy Schumer, Debra Messing and Peaches were among many others who also tweeted the Everytown message.

Meanwhile, musician Caleb Keeter, a performer at Sunday’s Route 91 Harvest Festival, wrote that he had changed his mind and now advocates gun control.

Numerous other entertainment figures joined the call to limit access to guns. “Sensible gun control NOW,” Alyssa Milano wrote.

Lena Dunham said “gun control is the only answer.”

Billy Eichner tweeted several calls to action supporting more firearms regulation.

Lady Gaga also called for legislators to “act quickly.”