Keith Olbermann

Award-Winning Host of "Olbermann"

Ed Rendell

Former Governor of Pennsylvania; NBC News Political Analyst & Author

Ambassador Munir Akram

Former Permanent Representative to the UN from Pakistan

Jason Romero

Blind Ultra-Athlete, World Record Holder, Humanitarian & Motivational Speaker

Pierce Brosnan

Actor, Producer & Activist; Best Known for His Role as James Bond

Abbi Jacobson & Ilana Glazer (Broad City)

Stars of the Comedy Central Series "Broad City"

Dan Futterman

American actor and screenwriter

Stephen Colbert

Host of "The Late Show with Stephen Colbert"

Barack Obama

44th President of the United States

Thomas Kail

Tony Award-Winning Film and Theater Director Known for "Hamilton" and "In the Heights"

Ellen Kullman

CEO of Carbon, Former Chair & CEO of DuPont & Former Director of General Motors

Oz Sanchez

Retired Special Forces Marine; 6x Paralympic Handcycling Medalist & Triathlete; Subject of the 2009 Documentary "Unbeaten"

Dexter R. Voisin

Top 2% of Global Experts on Violence & Wellness; Psychotherapist; Author; Dean & Professor at Case Western Reserve University

The Relationship Between Violence Syndemics and Sexual Risk Behaviors Among African Ame...

Dr. Kevin Snyder

Motivational Speaker & Author of "Think Differently;" Former University Teacher & Administrator

Bill Clinton

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

Katie Holmes

Award Winning Actress and Producer

John Mulaney

Stand-Up Comedian & Former Writer for "Saturday Night Live"

Darius Rucker

Lead Singer and Rhythm Guitarist of the Rock Band Hootie & the Blowfish

Paul Rusesabagina

Real Life Hero of Hotel Rwanda

Bill Bryson

Best-Selling Author Known for "A Short History of Nearly Everything" & "A Walk in the Woods"