Facebook and Time Warner have officially launched their Stop Bullying: Speak Up social pledge app, which is designed to encourage Facebook-using students, parents and educators to help stop bullying.

Part of the original bullying prevention initiative by Cartoon Network, the app represents the latest development in both companies’ long-term commitment to integrate broadcast, print, online and social media efforts.

Developed by social marketing agency Tenthwave, the app enables students, educators and parents to take a pledge to specific actions that will help stop bullying, share this pledge and stories with friends and family, recruit others to join the movement and start their own school-based bullying prevention groups on Facebook.

It also features a Take Action Center that includes tools and resources from several nonprofit, government, and academic organizations.

Celebrities such as Selena Gomez, Enrique Iglesias and CJ Manigo, Ali Sepasyar, and Jackson Rogow, hosts of Cartoon Network’s Dude, What Would Happen, have been among the first to officially take the pledge to speak up against bullying and are asking others to follow their lead.

Facebook, CNN, Cartoon Network and Time, meanwhile, will bring together their considerable resources to promote the app with a comprehensive multi-platform campaign.