LOS ANGELES (AP) - Leonardo DiCaprio and Tobey Maguire lead a cast of stars in a new public service announcement urging young voters to use social media to express the issues most important to them in the upcoming election.

Zac Efron, Selena Gomez, Ellen DeGeneres, Jonah Hill and Joseph Gordon Levitt also appear in the Vote 4 Stuff video unveiled Monday, joining other stars in a call to viewers to post tweets, photos and short videos about concerns they feel deserve presidential attention.

Edward Norton, Sarah Silverman, Benicio Del Toro and Amanda Seyfried are also featured in the 2 ½-minute video, which promises that content created in response will be incorporated into Vote 4 Stuff's future online efforts.

DiCaprio's production company, Appian Way, and publicity firm Sunshine Sachs are behind the nonpartisan voter-engagement campaign.