Barry Posner

Leadership Expert and Coauthor of "The Leadership Challenge"

Carolyn Porco

Planetary Scientist Known for her Work in the Exploration of the Outer Solar System

Rick Pitino

Head Coach of St. John's Men's Basketball Team

Harley Pasternak

Diet & Fitness Expert; Best-Selling Author

Michael Mina

James Beard Award-Winning Chef and Restaurateur

MC Lyte

Queen of Hip-Hop who Supports Worthy Causes such as AIDS Awareness, Anti-Violence & Rock-the-Vote

Ted Ligety

U.S. Champion Alpine Ski Racer; 2006 Olympic Gold Medalist

Nancy Lieberman

Basketball Hall of Famer; First Female Head Coach of a Men’s Professional Basketball Team; Two-Time Olympian; Former WNBA Coach & Acclaimed Broadcaster

Ludo Lefebvre

James Beard Award-Winning Chef, Judge on ABC's "The Taste" & Star of Sundance's "Ludo Bites America"

Michelle Kim

Actress, Producer, Writer & Founder of Hapaness Media

Jonathan Karl

Chief White House Correspondent for ABC News & Co-Anchor of "This Week with George Stephanopoulos"

Marcus Allen

Heisman Trophy Winner; Set 12 NCAA records at USC

Donovan Bailey

Hall of Fame Track & Field Legend

Joshua Brown

Author; CEO & Co-Founder of Ritholtz Wealth Management

Dan Pfeiffer

Former Senior Advisor to President Obama, CNN Contributor & Host of "Pod Save America"

The Cadillac Three

Country Music Group Known For "White Lightning," "The South" & "Party Like You"

Tasha Cobbs

Atlanta-Based Worship Leader and Musician

Do It Anyway: Don't Give Up Before It Gets Good

Jay Adelson

Founder and CEO of SimpleGeo Inc. Former CEO of Digg Inc.

Kevin O'Connor

Host of "This Old House" on PBS

Julia Alvarez

Award-Winning Poet, Novelist & Essayist

Nonny de la Peña

Founder & CEO of Emblematic Group; Known as "The Godmother of Virtual Reality"

Eric Migicovsky

Pebble CEO

Ronan Ryan

Chief Strategy Officer at IEX, Subject of Michael Lewis' Flash Boys

Brad Katsuyama

CEO of IEX (Investors Exchange), Subject of Michael Lewis' Flash Boys

Brendan Iribe

CEO, Oculus

Carl Lewis

9-Time Olympic Gold Medalist in Track & Field; Founder of The Carl Lewis Foundation

Natalie Maines

Singer-Songwriter & Activist; Best Known for Being Lead Singer of the Dixie Chicks

Steven Levy

Technology Journalist & Author

David Christian

David Christian teaches an ambitious world history course that tells the tale of the entire universe -- from the Big Bang 13 billion years ago to present day.

Fiorenzo Omenetto

Professor of Biomedical Engineering; Physicist