Matt Damon

Actor, Screenwriter & Producer; Co-Founder of Water.org; Expert Advocate on Global Water & Sanitation Crisis

Tamron Hall

Award-Winning Journalist; Former National News Anchor for NBC News; Host of the "Tamron Hall Show"

Watch Where They Hide

David Suzuki

Environmentalist & Scientist; Co-Founder of the David Suzuki Foundation

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Dr. Jonathan Foley

World Leading Climate Scientist & Executive Director of Project Drawdown

Moby

Musician, DJ, Photographer

Willie Nelson

Country Music Singer-Songwriter Known for "On The Road Again" & "Always On My Mind"

Rick Ridgeway

Environmentalist, Mountaineer, Expedition Author, Former VP of Environmental Initiatives & Special Projects at Patagonia

David Doubilet

National Geographic Photographer & Founding Member of the International League of Conservation Photographers

Alfonso Ribeiro

Host of America’s Funniest Home Videos, Actor, TV Director, Award-Winning Dancer & Broadway Star

Lynn Sherr

Award-winning Broadcaster & Best-selling Author; Correspondent 20/20

Dyan deNapoli

Penguin Expert, TED Speaker & Award-Winning Author of "The Great Penguin Rescue"

Ron Broussard

Author, Founder & CEO of STRETCH YOURSELF

Alison Victoria

Interior Designer; Host of HGTV's "Kitchen Crashers"

Alan Cumming

Emmy-Winning Actor Who Stars in "The Good Wife"

Tristram Stuart

Environmental Campaigner, Author & Businessman

Will Allen

Pioneer in the Urban Farming Movement, Author & Founder of Growing Power

Ingrid Newkirk

President, PETA

Vandana Shiva

World-Renowned Environmental Leader

Keegan-Michael Key

Actor, Producer, Writer & Comedian