Sophia Bush

Actress, Humanitarian & Author

Christiana Figueres

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

Sheryl Crow

Grammy Award-Winning Singer-Songwriter

Livia Firth

Co-Founder & Creative Director of Eco-Age

Alysia Reiner

Actor, Activist & Entrepreneur

Olivia Munn

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

Olivia Munn on Jon Stewart | 2022 Mark Twain Prize

Leonardo DiCaprio

Award-Winning Actor & Environmentalist

Amy Smart

Actress, Environmentalist & Co-Founder of Smart House Collections

Alanis Morissette

Alt-Rock Angst Icon Known for "You Oughta Know" & "Ironic"

Shailene Woodley

Actress & Environmental Activist

Cate Blanchett

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

Mark Ruffalo

Actor, Director, Producer, Screenwriter & Environmental Activist

Arnold Schwarzenegger

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

Vandana Shiva

World-Renowned Environmental Leader

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"

Van Jones

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

Adrian Grenier

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

Al Gore

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

Quannah Chasinghorse

Indigenous Activist & Model

Quannah ChasingHorse on Representation, Climate Exploitation

Aloe Blacc

Singer-Songwriter, Rapper & Musician; Known for "I Need A Dollar" & "Wake Me Up"

Debra Messing

Emmy Award-Winning Actress & Global Ambassador for PSI/Youth AIDS

J.B. Straubel

Co-Founder & Former Chief Technical Officer of Tesla

Steve Wozniak

Co-Founder of Apple Computer, Inc.

Jeremy Rifkin

Leading Global Technologist, Futurist, Authority on World Economic & Environmental Trends

Dr. Rumman Chowdhury

Responsible AI Fellow at Harvard University & Former Director of AI Ethics at Twitter

Pedro Domingos

Machine Learning, Artificial Intelligence, & Big Data Expert; Professor Emeritus of Computer Science & Engineering at the University of Washington; Author of "The Master Algorithm"

Adam Cheyer

Top Technology & AI Speaker; Co-Founder & VP of Engineering at Siri & Viv Labs

Bill Belichick

Former Head Football Coach for the New England Patriots; Eight Time Super Bowl Champion

Bill Belichick leaving Patriots after 24 seasons, sources say

Myke Towers

Puerto Rican Rapper & Songwriter