Alan Cumming

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

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Alyssa Milano

Actress, Author, Philanthropist & Founder of Touch by Alyssa Milano; Known for "Charmed" and "Who's the Boss"

Danny Trejo

Actor, Author, Activist & Restaurateur; Recovery & Intervention Counselor for Troubled Youth

David Suzuki

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

Erin Brockovich

Consumer Advocate, Author, TV Host & Environmental Activist

Gary White

CEO & Co-Founder of WaterEquity & Water.org with Matt Damon

Jillian Michaels

Leading Fitness Expert, Certified Nutritionist, Renowned Life Coach & Powerful Entrepreneur

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Michael Shellenberger

Founder & President of Environmental Progress; Expert on Energy, Climate, Security, Human Development and Politics

Robert Ballard

Renowned Ocean Explorer & Scientist

Shaun Tomson

Former World Champion Surfer, Environmentalist & Motivational Speaker

Sophia Bush

Actress, Humanitarian & Author

Sylvia Acevedo

Engineer, Rocket Scientist & Technology Leader; Inspirational Speaker; Corporate Director at Qualcomm; Former CEO of Girl Scouts USA

How Sylvia Acevedo Defied Barriers to Become Girl Scout CEO

Tamron Hall

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

Watch Where They Hide

Tim Gunn

Fashion Icon, Former Co-Host & Mentor of "Project Runway"

Tony Juniper

Writer, Sustainability Advisor, & Environmentalist