James Cameron

Chair of Crown Agents; Former Chairman of Overseas Development Institute

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)

Maroon 5

American Pop/Rock Band Known for the Hit Singles, "Maps," "Love Somebody" & "Misery"

Tabitha Brown

Vegan Food Influencer & Actress

I Did a New Thing: 30 Days to Living Free (A Feeding the Soul Book)

Nico Rosberg

Sustainability Entrepreneur & Formula 1 World Champion

Alex Honnold

Professional Rock Climber & Star of the Academy-Award Winning Documentary "Free Solo"

Paul Polman

Business Leader; Climate & Equality Campaigner; Co-Author of “Net Positive”

Deepak Chopra

Co-Founder of The Chopra Center for Wellbeing

Tony Fadell

Investor, Author, Principal at Future Shape LLC, Former CEO & Founder of Nest Labs

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"

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

Roger Martin

Management Thinker, Author, Strategist & Advisor

A Plan Is Not a Strategy - YouTube

Parag Khanna

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

Ashley Judd

Actress, Activist & Humanitarian

Blake Mycoskie

Founder of TOMS, Social Entrepreneur & Author of NY Times Bestseller "Start Something That Matters"

Shailene Woodley

Actress & Environmental Activist