Jason Momoa

Actor, Director & Environmental Activist; Known for "Game of Thrones" & "Aquaman"

Ryan Reynolds

Producer, Screenwriter, Actor & Entrepreneur; Co-Owner of Welsh Football Club Wrexham A.F.C.

Matt Damon

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

Jessica Alba

Actress; Entrepreneur; Founder & CEO of The Honest Company

Arnold Schwarzenegger

Actor, Producer, Director, Writer; California’s 38th Governor; Host of "Celebrity Apprentice"

Bill Maher

Political Satirist & Host of HBO's "Real Time"

Gov. Ron DeSantis | Real Time with Bill Maher (HBO)

James Cameron

Filmmaker, Artist, Environmentalist

Willie Nelson

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

Cate Blanchett

Academy Award-Winning Actress Known for "Elizabeth" & "The Aviator;" Ambassador for the Australian Conservation Foundation

Olivia Munn

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

Olivia Munn on Jon Stewart | 2022 Mark Twain Prize

Jake Gyllenhaal

Academy Award-Nominated & BAFTA Award-winning Actor; Environmental Activist

Pink

Singer-Songwriter, Actress, Philanthropist & Environmental Activist

Brad Pitt

Actor, Producer, Philanthropist & Environmental Activist

Harrison Ford

Award-Winning Actor Known for "Star Wars" & "Indiana Jones"

Bono

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

Mayim Bialik

Neuroscientist, Mental Health Advocate & Actress Known for "The Big Bang Theory"

Don Cheadle

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

Yang Lan

Co-Founder & Chairperson of the Sun Media Group & Sun Culture Foundation; Called the 'Oprah of China'

Ian Somerhalder

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

Bill Nye

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

Parag Khanna

Managing Partner at FutureMap; Strategic Advisor to Governments & Global Companies; Bestselling Author; TED Speaker

Ashley Judd

Actress, Activist & Humanitarian

Ted Danson

Emmy Award-Winning Actor, Environmental Activist & Philanthropist; Known for "Cheers," "Curb Your Enthusiasm" & "The Good Place"

A Conversation with Ted Danson & Mary Steenburgen | ATX TV Festival

Tom Colicchio

Chef & Owner of Crafted Hospitality

Nash Grier

Social Media Guru, Digital Influencer & Environmental Activist

Imogen Heap

Musician, Producer & Founder of Mycelia For Music

Robert Redford

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

Aidan Gallagher

Actor, Musician & UN Environment Goodwill Program Ambassador; Known for "The Umbrella Academy"

Aidan Gallagher On 'The Umbrella Academy' and His Music | Seventeen

Laura Dern

Actress, Director, Producer & Activist

Sigourney Weaver

Golden Globe-Winning Actress & Environmentalist