Last month, Woodley brought Bobby Jean from the Standing Rock tribe to the Snowden
premiere in New York City, and the women spoke to ET's Carly Steel about why they felt compelled to "bring awareness" to this issue.
"They're trying to collect, protect clean water, not only for indigenous communities but for all communities around the world," Woodley explained. "Right now, we're privileged. We can buy water for a dollar, a water bottle for a dollar. We can turn on our faucets and have tap water. But in 10, 15, 20 years, when our kids are grown up, who knows if you'll still be able to still buy a bottle of water for a dollar. It could be $8, $10. ...It's going to become a valued commodity."WATCH: Rosario Dawson Arrested After Crossing Police Line at Democracy Spring Protest in DCReporting by Steven Wilks.