Ray Lewis

Celebrated NFL Linebacker, The Ray Lewis Family Foundation Founder & ESPN Commentator

Peyton Manning & Ray Lewis reminisce on their playing days

Andie MacDowell

Film Actress

Andy Borowitz

New York Times Best-Selling Author and Comedian; Creator of the Borowitz Report

Aasif Mandvi

Comedic Actor & Former Correspondent for "The Daily Show"

Eric Thomas

Inspirational Speaker, Life Strategist & Author

Chris Spielman

Former All-Star Linebacker, Special Assistant for the Detroit Lions & Breast Cancer Awareness Advocate

Henry Winkler

Actor, Producer, Director & Best-Selling Author; Best Known for "Happy Days"

Dr. John C. Maxwell

Leadership Expert & Author

Anne-Marie Slaughter

Foreign Policy Expert, Author & CEO of New America Foundation

Gabby Douglas

First African-American to Win Olympic Gold Medal for Gymnastics; Author of New York Times Bestseller "Grace, Gold & Glory: My Leap of Faith"

Iyanla Vanzant

New York Times Best-Selling Author, Spiritual Life Coach & Host of "Iyanla Fix My Life"

Professor Richard Dawkins

Evolutionary Biologist & Best-Selling Author

Richard Dawkins & Lawrence Krauss ...

Alison Krauss

Bluegrass-Country Singer-Songwriter & Fiddle Virtuoso

Hasan Minhaj

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

John Legend

EGOT Winning Musician, Producer & Philantropist

William Shatner

Emmy-Award Winning Actor, Known for "Star Trek" & "Boston Legal"

Ray Kurzweil

Chairman of Kurzweil Technologies, Inventor & Futurist; Author of "How to Create a Mind"

Ben Stein

Political Economist, Commentator, Author & Actor

Mitt Romney

Former Governor of Massachusetts, 2012 Republican Presidential Nominee and CEO

Jimmy Wales

Founder of Wikipedia & Wikitribune