Hannah Fry

Complexity Theorist & Author of "The Mathematics of Love"

Paul Polman

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

Jimmy Eat World

Alternative '90s Rock Band Known for "The Middle"

Jimmy Eat World: NPR Music Tiny Desk Concert

Rachel Roy

Fashion Designer; Founder of Rachel Roy

Leona Lewis

Singer, Songwriter & Animal Welfare Activist; Best Known for "Bleeding Love"

Peter Singer

Australian Philosopher, Author & Father of the Animal Rights Movement

Ernie Johnson, Jr.

Sports Broadcaster, Host of TNT's "Inside the NBA", "NCAA Division | Men's Basketball Championship" on CBS & Major League Baseball on TBS

Chesley (Sully) Sullenberger III

"Miracle on the Hudson" Hero Pilot, Retired Air Force Fighter Pilot & Best-Selling Author

Paul LeBlanc

President of Southern New Hampshire University

Nas

Grammy-Nominated Rapper, Songwriter & Record Producer

John Ashcroft

Former U.S. Attorney General, Former Governor & Senator of Missouri

Daniel Lamarre

President & CEO of Cirque du Soleil

Oscar Arias

Former President of Costa Rica & Nobel Laureate

Michael Duke

Former CEO of Walmart

Simon Zadek

CEO, AccountAbility

Sanaa Lathan

Actress; Known for "Love & Basketball" and "The Best Man"

Michael Shellenberger

Founder & President of Environmental Progress; Expert on Energy, Climate, Security, Human Development and Politics

Deborah E. Lipstadt

Professor of Modern Jewish & Holocaust Studies at Emory University

Ayesha Khanna

Artificial Intelligence Solutions Expert; Leading Advisor on Our Intelligent Future; Co-Founder & CEO of Addo

Akbar Gbajabiamila

Inspirational Former NFL Player & Broadcaster; Host of American Ninja Warrior & Co-Host of The Talk