Written and directed by Chloe Domont, the 'My Body Of Water' video brings celebrities together to talk about the fossil fuel extraction industry, which is "drilling into our water shed with toxic chemicals".
Other celebrities who also appear in the video campaign are The Walking Dead's Norman Reedus, We Need to Talk About Kevin's Ezra Miller, former America's Next Top Model judge Nigel Barker, comedian Sandra Bernhard and model Alek Wek.
Christina McLarty, Nev Shulman, Toure, Mehdi Nebbou, Alysia Reiner, Melissa Auf Der Maur and Chris Taylor are also featured in the video.
"Don't we have the right to know what's in our water?" Entourage actor Grenier asks.
Celebrities proclaim that it's "my water", with Meester saying: "And I'm going to protect it because it's the only body of water I have."