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*Bono, Matt Damon, Ben Affleck, Morgan Freeman and “The Walking Dead” actress Danai Gurira are among the celebrities literally waiting for the world to take action in a new online campaign addressing the Ebola epidemic in West Africa.

In a video posted Wednesday, stars such as Will Ferrell, Thandie Newton and Connie Britton stare silently into a camera to illustrate that they’re still waiting for world leaders to fight Ebola, which has killed more than 5,000 people in the West African countries of Sierra Leone, Guinea and Liberia.

“The waiting is causing the issue to propel itself,” Gurira said. “I thought it was a very powerful way to get that message across that we do need action. Sitting and waiting can lead to more problems.”

Other stars appearing in the One Campaign’s two-minute video include Vincent Cassel, Akon, Ellie Goulding, German soccer star Per Mertesacker and African musicians Fally Ipupa, Angelique Kidjo, Femi Kuti and Ice Prince. They’re joined by Liberian health care workers Dr. J. Soka Moses and Louise Gaye.

“We thought there was something extremely powerful in not having them say anything,” said Michael Elliott, CEO of the One Campaign. “We asked them to look into the camera, and we came up with just a few simple lines explaining that we’ve waited too long in the past, and we can’t wait too long in the future.”

Watch below:

One Campaign is asking citizens to sign a petition demanding that world leaders strengthen health care systems in developing countries and end the outbreak.

The video is being released alongside the One Campaign’s online Ebola response tracker, which shows how much money countries have pledged to tackle Ebola, how much has been disbursed and how many health workers and other contributions have been sent to affected countries.