Steven Levitt

Economist, NY Times Bestselling Author of "Freakonomics," "SuperFreakonomics" & "Think Like a Freak"

Spike Lee

Academy Award-Winning Writer, Producer, Actor & Director; Best Known for "BlacKkKlansman" & "Malcolm X"

Ashley Judd

Actress, Activist & Humanitarian

J.B. Straubel

Co-Founder & Former Chief Technical Officer of Tesla

Marc Raibert

Founder of Boston Dynamics & Advanced Robotics Expert

Clay Walker

Country Music Artist Known For "What's It to You" & Multiple Sclerosis Survivor & Founder of Band Against MS

T.J. Miller

Actor and Stand-Up Comedian, Currently Starring in HBO's 'Silicon Valley'

Nick Offerman

Actor, Writer & Carpenter; Best Known for "Parks and Recreation"

Alan Alda

Actor; Writer; Science Advocate; Director

Peter Thiel

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

Rob Lowe

Actor, Best-Selling Author, Podcaster & Philanthropist

Mitt Romney

Former Governor of Massachusetts, 2012 Republican Presidential Nominee and CEO

Andie MacDowell

Film Actress

Blythe Danner

Emmy Award-Winning Actress & Activist

Gary Sinise

Actor & Advocate for America's Servicemen and Women; Founder of the Gary Sinise Foundation

Kevin Spacey

Two-Time Academy Award-Winning Actor, Director, Producer, Screenwriter and Singer; Best Known For His Roles in "American Beauty" and Netflix's "House of Cards"

Hasan Minhaj

Comedian, Actor, Writer & Star of "Patriot Act with Hasan Minhaj"

Russell Wilson

NFL Quarterback for the Pittsburgh Steelers; Super Bowl Champion, Entrepreneur & Philanthropist

Ronda Rousey

Former UFC Champion & WWE Wrestler; Olympic Medalist; Actor & Author

Our Fight: A Memoir

Viola Davis

Academy Award-Winning Actress, Producer & New York Times Best-Selling Author

Viola Davis on Speaking Up, Challenging Stereotypes