Matt Damon

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

Alice Waters

Executive Chef, Founder & Owner of Chez Panisse; Sustainable Agriculture Advocate

Christiana Figueres

Expert on Global Climate Change; Former Executive Secretary of the UN Framework Convention on Climate Change

Gary White

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

Cesar Millan

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

William McDonough

Renowned Architectural Designer, Advisor & Co-Author of "Cradle to Cradle + The Upcycle"

Adrian Grenier

Actor Known for HBO's "Entourage"; Environmental Activist; UN Ambassador

Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

Edward Norton

Award Winning Actor & Filmmaker

Mark Ruffalo

Actor, Director, Producer, Screenwriter & Environmental Activist

Tim Gunn

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

Ian Somerhalder

Actor Known for "The Vampire Diaries"; Animal & Environmental Advocate; Founder of The Ian Somerhalder Foundation

Rachael Ray

Chef, Cookbook Author & Television Host Known for the "Rachael Ray Show"

Dr. Michio Kaku

World-Renowned Futurist & Theoretical Physicist

Darin Olien

Co-Host of Netflix "Down To Earth" with Zac Efron, Best-Selling; Original Formulator of "Shakeology;" Healthy Living & Superfoods Expert

Sophia Bush

Actress, Humanitarian & Author

Dennis Dimick

Former Executive Environment Editor at National Geographic Magazine

Vandana Shiva

World-Renowned Environmental Leader

Alyssa Milano

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

Michael Liebreich

Chairman & CEO of Liebreich Associates

Lisa Vanderpump

Entrepreneur, TV Personality, Author & Philanthropist

Lisa Vanderpump Tells Us About Her First Times

Olivia Munn

Television & Film Actress; Known for "Newsroom" & "X-Men: Apocalypse"

Olivia Munn on Jon Stewart | 2022 Mark Twain Prize

Pierce Brosnan

Actor, Producer & Activist; Best Known for His Role as James Bond

Brad Pitt

Actor, Producer, Philanthropist & Environmental Activist

Amy Smart

Actress, Environmentalist & Co-Founder of Smart House Collections

Pink

Singer-Songwriter, Actress, Philanthropist & Environmental Activist

Trish Regan

Investigative Journalist, Host of "Trish Regan Primetime"

Moby

Musician, DJ, Photographer

Hilary Swank

Academy Award-Winning Actress; Best known for her roles in 'Million Dollar Baby' and 'Boys Don't Cry'

Ryan Seacrest

Radio Personality, TV Host & Producer Best Known for "American Idol" and "On Air with Ryan Seacrest"