Lena Dunham

Writer, Director, Actor & Producer Best Known for HBO’s “Girls”

Tim Tebow

ESPN College Football Analyst; Heisman Trophy Winner; Former Quarterback for NFL's Denver Broncos & Baseball Outfielder for the New York Mets

Caterina Fake

Co-Founder of Flickr & Former Chairman of Etsy

David Suzuki

Environmentalist & Scientist; Co-Founder of the David Suzuki Foundation

Drew Houston

Co-Founder & CEO of Dropbox

Denise Austin

Fitness Expert, Author & Video Hall of Famer

Angela Ahrendts

Former SVP of Retail at Apple & Former CEO of Burberry

Gayle King

Co-Host of "CBS This Morning" & Editor-At-Large of O, The Oprah Magazine

Craig Newmark

Founder of Craigslist; Internet Entrepreneur; Leader in Social Networks

Tamron Hall

Award-Winning Journalist; Former National News Anchor for NBC News; Host of the "Tamron Hall Show"

Watch Where They Hide

Sergio Zyman

Marketing Visionary; Former Coca-Cola Marketer

Suzy Welch

Best-Selling Author, Popular Television Commentator & Noted Business Journalist

Sallie Krawcheck

Founder & CEO of Ellevest; Author of "Own It: The Power of Women at Work"

John P. Kotter

Leadership & Change Management Guru

Jim McCann

President & CEO of 1-800-FLOWERS.COM

Graham Hill

Founder of Life Edited & TreeHugger.com

Mark Burnett

CEO, One Three Media; Five time Emmy Award Winning Producer

Scott McKain

Customer Experience Expert & Best-Selling Business Author

Tan Le

CEO of EMOTIV; Non Executive Director at QBE Insurance Group; Author of "The NeuroGeneration;" Member of Global Future Council on Neurotechnologies at World Economic Forum

Douglas Conant

Chairman, Avon Products; Founder & CEO, Conantleadership; Chairman, Kellogg Executive Leadership Institute at Northwestern University; Former CEO & President, Campbell Soup Company