Alex Rosenberg

Author & Professor of Philosophy at Duke University

Billy Hallowell

Faith and Culture Editor — The Blaze

Billy Joel

Globally-Recognized Pianist, Singer-Songwriter and Composer

Chris Brewster

Stunt Performer

Clint Mathis

Retired American soccer player

Daniel Igali

Olympic Gold Medal Wrestler

Daron Rahlves

Freestyle skier and a former alpine ski racer with the U.S. Ski Team

Darwin Grey

David Regis

Professional Soccer Player; World Cup Champion

Hugh Laurie

Actor Best Known for His Role in the Medical Drama "House M.D."

James Cameron

Filmmaker, Artist, Environmentalist

Jodie Foster

Actress, Film Director & Producer Known for "Silence of the Lambs"

Keira Knightley

Academy Award-nominated English actress

Kory Puderbaugh

Paralympic Silver Medalist

Matt Dillahunty

Atheist Activist, Host of The Atheist Experience, Lecturer & Debater

Peter Rollins

Modern Philosopher & Theologian

Prem Kamble

Top Consultant in ERP and IT-Driven Change Management

Ricky Gervais

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

Robert Wright

Author, Journalist & Scholar

Roger Federer

Professional Tennis Player & Record Holder for Most Grand Slam Titles Won; Ranked No. 1 in the World for a Total of Over 6 Years