Cesar Millan

Host of The Dog Whisperer; Author of Cesar's Way

David Suzuki

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

Tamron Hall

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

Watch Where They Hide

Kevin Nealon

Former Cast Member of 'Saturday Night Live'; Co-Star on Showtime's "Weeds"

Moby

Musician, DJ, Photographer

Alison Victoria

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

Shaun Tomson

Former World Champion Surfer, Environmentalist & Motivational Speaker

Philippe Cousteau

Explorer, Social Entrepreneur & Environmental Advocate; Grandson of Captain Jacques-Yves Cousteau

Kristin Bauer van Straten

Best known as Pam on HBO's "True Blood"

Alan Cumming

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

Vandana Shiva

World-Renowned Environmental Leader

Roselyn Sanchez

Puerto Rican Singer-Songwriter, Model, Actress, Producer and Writer; Carmen Luna in "Devious Maids"

Hazel O'Leary

Former Secretary of Energy

Amy Smart

Actress, Environmentalist & Co-Founder of Smart House Collections

Torrey DeVitto

Actress, Model, Ambassador for NHPCO & Advocate

Dr. Jonathan Foley

World Leading Climate Scientist & Executive Director of Project Drawdown

Ty Murray

Retired Professional Bull Rider; Seven Time All Around Champion

Rick Ridgeway

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

Kelly Wearstler

Interior and Fashion Designer

Joey Lawrence

Actor, Singer & TV Host; Known for his Role in "Melissa & Joey"