Lena Dunham

Writer, Director, Actor & Producer Best Known for HBO’s “Girls”

Tim Tebow

ESPN College Football Analyst; Heisman Trophy Winner; Former Quarterback for NFL's Denver Broncos & Baseball Outfielder for the New York Mets

Gayle King

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

Juan Williams

New York Times Best-Selling Author, Fox News Political Analyst, Co-Host of "The Five" & Award-Winning Columnist

Bill Clinton

42nd President of the United States; Founder of the William J. Clinton Foundation

Tim O'Reilly

Founder & CEO of O'Reilly Media

Jeffrey Garten

Professor, Yale School of Management and Expert on Global Business Strategy

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Rahm Emanuel

First Jewish Mayor of Chicago & Former White House Chief of Staff

Dana Perino

Political Commentator, Co-Anchor of "America's Newsroom" & Podcast Host of "Perino on Politics"; Former White House Press Secretary

David Allen

Bestselling Author & Founder of The David Allen Company

Andreas Weigend

Director, Social Data Lab & Former Chief Scientist, Amazon

John Sculley

Vice-Chairman of MDLIVE, Former CEO of Apple Computers & PepsiCo; High-Tech Entrepreneur, Venture Capitalist & Author

Dr. Dean Ornish

Physician, Leading Researcher in Healthcare, Founder of the Preventive Medicine Research Institute & Bestselling Author

Nicholas Christakis

Sol Goldman Family Professor of Social & Natural Science; Director of the Human Nature Lab; Co-Director of the Yale Institute for Network Science

Harry Shearer

Actor and Comedian; Known for "The Simpsons" and "Spinal Tap"

Craig Venter

Founder & CEO of Synthetic Genomics Inc.

John Zogby

Trendspotter & Leading Pollster

Michael Steele

Conservative Political Commentator & Former Republican Party Politician

Sarah Silverman

Stand-Up Comedian, Actress, Singer, Producer & Writer

Marianne Williamson

Renowned Authority on Spirituality & Metaphysics; Author of "Everyday Grace;" 2024 Democratic Presidential Candidate

Shashi Tharoor

Diplomat & Author; Former United Nations Under-Secretary-General

Chris Matthews

Former Host, Hardball with Chris Matthews, MSNBC

Tracy Anderson

Fitness Pioneer, Entrepreneur & Author, Founder of The Tracy Anderson Method

Tracy Anderson shares moves to work your whole body

Debbie Gibson

Singer-Songwriter and Reality TV Star; "Only In My Dreams"

Jon Meacham

Pulitzer Prize-Winning Historian & Author

Jon Meacham discusses the historic nature of Trump's indictment ...

Ben Goldacre

Physician; Best-Selling Academic & Science Writer

Bernard Kouchner

Former Minister of Health of France; Founder of Nobel Peace Prize-Winning Médecins Sans Frontières

Alec Ross

Author of "The Industries of the Future," and Recent Senior Advisor for Innovation to Hilary Clinton

James Watson

Molecular Biologist, Geneticist & Zoologist