Shailene Woodley

Actress & Environmental Activist

Megyn Kelly

Former Host of "Megyn Kelly Today" & Former Fox News Anchor

Todd Park

Co-founder and Executive Chairman, Co-founder of Athenahealth and Castlight Health; former U.S. Chief Technology Officer

Joe Kiani

Founder, Chairman & CEO of Masimo, a Medical Technology Company

James Park

CEO & Co-founder of Fitbit

David Blaine

Magician, Illusionist and Endurance Artist

Marissa Mayer

Co-Founder and CEO of Sunshine; Former President & CEO of Yahoo!

Ricky Gervais

Award-Winning English Comedian & Actor; Known for "The Office" and "Extras"

Steve Ballmer

Former CEO Microsoft; Owner of the Los Angeles Clippers

Maria Bartiromo

Global Markets Editor, FOX Business Network

Anne Wojcicki

Co-Founder & CEO of 23andMe

Dr. Mehmet Oz

Cardiothoracic Surgeon; Host of "The Dr. Oz Show;" Columbia University Professor & Author

Kim Ng

Former General Manager of the Miami Marlins; MLB's First Female GM; Former VP of Baseball Operations for Major League Baseball

Raghuram Rajan

Professor of Finance at The University of Chicago & Author

Caitlyn Jenner

TV Personality & Olympic Gold Medalist; Co-Host of "Keeping Up With Sports"

Mitt and Ann Romney

Former Presidential Candidate and Governor of Massachusetts & Former First Lady of Massachusetts and Wife of Mitt Romney

Anderson Cooper

Journalist, TV Personality, Anchor of CNN's "Anderson Cooper 360°"

Gladys Knight

Singer-Songwriter & Actress

Nick Clegg

President, Global Affairs at Meta; Former UK Deputy Prime Minister

How To Stop Brexit (And Make Britain Great Again)

Lawrence Summers

Professor & Former President of Harvard University; Former Secretary of the Treasury, Director of the National Economic Council, & Chief Economist of the World Bank

Gayle King

Co-Host of "CBS This Morning" & Editor-At-Large of O, The Oprah Magazine

Tony Abbott

Former Prime Minister of Australia

Tony Abbott Speaks Out

Mehmood Khan

Vice Chairman & Chief Scientific Officer at PepsiCo

Joe Hockey

Political Commentator, Former Australian Ambassador to the United States

Astro Teller

Captain of Moonshots, Google X

Jan Koum

Founder of WhatsApp Inc.

Peter Thiel

Former CEO and Co-founder of PayPal; Technology Entrepreneur, Investor and Philanthropist

Jonathan Bush

Technology Entrepreneur; Co-Founder & Former CEO of athenahealth

Michael Liebreich

Chairman & CEO of Liebreich Associates

Mitt Romney

Former Governor of Massachusetts, 2012 Republican Presidential Nominee and CEO