Sophia Bush

Actress, Humanitarian & Author

Matt Damon

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

Adrian Grenier

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

Don Cheadle

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

Al Gore

45th Vice President of the United States, Nobel Peace Laureate & Bestselling Author

Gary White

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

Christiana Figueres

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

Leonardo DiCaprio

Award-Winning Actor & Environmentalist

Brad Pitt

Actor, Producer, Philanthropist & Environmental Activist

Edward Norton

Award Winning Actor & Filmmaker

Bono

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

Olivia Munn

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

Olivia Munn on Jon Stewart | 2022 Mark Twain Prize

Robert Redford

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

Sheryl Crow

Grammy Award-Winning Singer-Songwriter

Darin Olien

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

Alyssa Milano

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

Cate Blanchett

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

Pierce Brosnan

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

Shailene Woodley

Actress & Environmental Activist

Kimbal Musk

Chef, Restaurateur & Philanthropist