VIDEO : Amy Schumer and More Celebrities Urge America to 'End Gun Violence' in New PSA

When it comes to gun violence in America, politicians have already sounded off?and now it's Hollywood's turn.  A-list actors like Sofia Vergara , Jennifer Aniston , Debra Messing , Amanda Peet and an array of other notable celebrities appeared in a new public service announcement video released Wednesday by Everytown for Gun Safety, a non-profit organization aimed at advocating for gun control.  Trainwreck  actress Amy Schumer who also appears in the clip, has significant ties to the effects of gun violence after John Russel Houser fatally shot two audience members at a showing of her film at a Louisiana movie theater.