Beyonce, Jennifer Aniston, Selena Gomez, Jaime Foxx, Conan O'Brien, Ellen DeGeneres and other entertainers are appearing in a PSA calling on Americans to "demand a plan" to stop gun violence.
"How many more?" the stars ask, before action will be taken.
No more "if we had just done something yesterday," says Aniston in the video, which was released Friday.
Her pal, Courteney Cox, also appears in the PSA as does Beyonce's friend, Gwyneth Paltrow.
Mad Men's Jon Hamm, Game of Thrones star Peter Dinklage, The Good Wife's Josh Charles, musician John Legend and comedian Chris Rock also make appearances.
The group Mayors Against Illegal Guns is behind the campaign Demand a Plan to End Gun Violence, which produced the PSA.
(Copyright © 2012 USA TODAY)