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Bradley Cooper, Jessica Alba, Olivia Munn, Liam Neeson, Julianne Moore, and the Duplass brothers are among the dozens of Hollywood stars who signed their names to a letter expressing praise and support for President Barack Obama’s recent efforts to prevent gun violence.

“Thank you for having the courage and leadership to take executive action on preventing more unnecessary gun violence in this country,” the letter says. “We are deeply thankful for the actions you took this week. Countless lives will be saved as a result.

“Like you, and like most Americans, we have had ENOUGH,” it continues. “We have had enough of seeing unthinkable tragedies happen and nothing being done.”

The letter, which was organized by the Brady Campaign and Center to Prevent Gun Violence, says that mass shootings such as those at Sandy Hook Elementary School in 2012 and in San Bernardino, California in 2015 demonstrate the need for stricter gun laws.

“No one is challenging the right of law abiding citizens to responsibly own a firearm,” the letter says. “But like you, we believe that guns should be kept away from criminals, terrorists, domestic abusers, the dangerously mentally ill, and children.”

On Monday, Obama moved to expand background checks for potential buyers of firearms, and to increase enforcement of existing laws.

Read the full letter and list of signees at