Mandy Patinkin

Actor Best Known for "Homeland," "Criminal Minds" and "The Princess Bride"

Ken Jennings

Jeopardy! "Greatest Of All Time" Winner; Longest Jeopardy! Winning Streak with 74 Games & NYT Bestselling Author

Tim O'Reilly

Founder & CEO of O'Reilly Media

Franklin Graham

President & CEO of the Billy Graham Evangelistic Association, Christian Evangelist & Missionary

Marvin Zonis

Political Economist & Consultant

Craig Kielburger

Co-Founder of the WE Organization, Social Entrepreneur, Humanitarian & New York Times Best-Selling Author

Hope Solo

Professional Soccer Goalkeeper; Two-Time Olympic Gold Medalist; World Cup Champion; Currently Plays for the Seattle Reign FC

Steven Brill

Award-Winning Journalist and Author

Dr. Marc Lamont Hill

Temple University Professor, BET News Correspondent, Activist, Author

Drew Gilpin Faust

President of Harvard University

Paula Poundstone

Stand-Up Comedian, Television Personality and Panelist on NPR's "Wait Wait...Don't Tell Me"

Blaise Aguera y Arcas

Works on Machine Intelligence at Google; Former Architect of Bing Maps and Bing Mobile

Blaise Agüera Y Arcas | Rights and Liberties in an Automated World

Philippe Cousteau

Explorer, Social Entrepreneur & Environmental Advocate; Grandson of Captain Jacques-Yves Cousteau

John Sculley

Vice-Chairman of MDLIVE, Former CEO of Apple Computers & PepsiCo; High-Tech Entrepreneur, Venture Capitalist & Author

Marc Eckō

Founder & Chief Creative Officer of Marc Ecko Enterprises, Author of Unlabel: Selling You Without Selling Out

Clay Aiken

Singer-Songwriter, Runner Up on FOX's "American Idol" & North Carolina Politician

Kristen Johnston

Emmy Award Winning Actress; Best Known for "3rd Rock From The Sun"

Jose Ferreira

Founder and CEO of Knewton; Focused on Education Innovation, Tech and Entrepreneurship

Sarah Darling

Country music singer/songwriter know for her hit songs, "Something to Do with Your Hands," "Little Umbrellas" and "Jack of Hearts"

Tal Ben-Shahar

Best-Selling Author & Positive Psychology Expert