Ashley Judd

Actress, Activist & Humanitarian

Sophia Bush

Actress, Humanitarian & Author

Brad Pitt

Actor, Producer, Philanthropist & Environmental Activist

Don Cheadle

Actor, Activist & Author; Known for "Iron Man 2" & "Hotel Rwanda"

Jeff Orlowski-Yang

Award-winning Filmmaker, Photographer, Entrepreneur & Climate Change Activist

Alicia Silverstone

Actress & Animal Rights Activist

Beyoncé Knowles-Carter

R&B and Pop Singer-Songwriter, Actress & Cultural Icon; Most Recently Known for "Cowboy Carter"

Beyoncé - Chicago Sun-Times

Van Jones

CEO of REFORM Alliance, CNN host, Emmy Award-winning Producer & NY Times Best-Selling Author

Ed Begley Jr.

Environmental Activist & Emmy Award-Nominated Actor

Marion Cotillard

Academy Award-Winning French Actress; Environmental Activist & Greenpeace Spokesperson

Matt Damon

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

Lady Gaga

Grammy Award-Winning Pop Singer-Songwriter & Award-Winning Actress Known for "A Star is Born" & "Joker: Folie à Deux'; Founder of Haus Labs Cosmetics

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Emmanuelle Chriqui

Actress Known for "Entourage;" Social Advocate for Colon Cancer, Environmental Issues & Human Rights in Congo

Ian Somerhalder

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

Robert Redford

Actor, Director, Producer, Environmentalist & Founder of the Sundance Film Festival

Alysia Reiner

Actor, Activist & Entrepreneur

Oprah Winfrey

CEO of Oprah Winfrey Network, Presidential Medal of Freedom Recipient & National Women's Hall of Famer

Oprah Winfrey: Broken Open | Oprah's Super Soul | OWN Podcasts ...

Mark Ruffalo

Actor, Director, Producer, Screenwriter & Environmental Activist

Bill Nye

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

Darren Aronofsky

Filmmaker & Director Known for "Black Swan" & "The Wrestler"

Patricia Arquette

Academy Award-Winning Actress, Activist, Humanitarian & Author

Will Smith

Actor, Producer, Entrepreneur, Philanthropist & Author

Edward Norton

Award Winning Actor & Filmmaker

Hayden Panettiere

Actress Known for "Nashville" & "Heroes" & Animal Rights Activist

Alyssa Milano

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

Spike Lee

Academy Award-Winning Writer, Producer, Actor & Director; Best Known for "BlacKkKlansman" & "Malcolm X"

Daniel Esty

Hillhouse Professor of Environmental Law and Policy at Yale Law School, Corporate Environmental Strategy Expert & Co-Author of "Green to Gold"

Bono

Lead Singer of U2, Activist & Co-Founder of DATA (Debt, AIDS, Trade, Africa)

Kehkashan Basu

Forbes 30 under 30, United Nations Human Rights Champion, National Geographic Young Explorer & Founder-President of Green Hope Foundation