Beyonce, Jennifer Aniston, Reese Witherspoon and Gwyneth Paltrow are among the stars who have recorded a special video message demanding a new plan for gun law reform.
Suspected gunman Adam Lanza, 20, opened fire at Sandy Hook Elementary School in Newtown, Connecticut last week, killing 20 young children and six adults, before allegedly turning the weapon on himself.
The massacre is the latest tragedy to rock America in recent years, following shootings at Colorado's Columbine High School in 1999, Virginia Polytechnic Institute and State University in 2007, and a movie theatre in Aurora, Colorado in July.
And in the video, celebrities also including John Legend, Cameron Diaz and Selena Gomez, take turns asking when the violence will end and urge viewers to call for change.
The sombre black-and-white clip was released on Friday – exactly one week after the Sandy Hook massacre - to coincide with the launch of Demand a Plan, a new movement which seeks to ban the sale of assault weapons, among other things.
The 10 worst superhero movies of all time Okay, Iron Man 3 is solidly a hit with both critics and fans. So before Man of Steel, R.I.P.D., Kick Ass 2 and Thor: The Dark World land in theatres, we thought now was a good time to take a look back at some comic book film adaptations that have missed ... Read more
5 Cannes films you can expect at TIFF With the Cannes film festival getting underway, movie buffs can start to look forward to the Toronto International Film Festival with an eye on some high-profile films debuting in the South of France that may have their North American premiere here in ... Read more