Erin Gruwell

Founder & Executive Director of the Freedom Writers Foundation; Education Reform Advocate

Mayim Bialik

Neuroscientist, Mental Health Advocate & Actress Known for "The Big Bang Theory"

Andy Cohen

Emmy Award-Winning Host & Producer of Bravo’s "Watch What Happens: Live"

Andy Cohen reacts to his infamous New Year’s Eve rant

Sherry Lansing

Former CEO of Paramount Pictures & Founder of The Sherry Lansing Foundation

Tiffany Shlain

Founder of The Webby Awards; Emmy-Nominated Filmmaker, Bestselling Author, Internet Pioneer & Futurist

Tracee Ellis Ross

Actress, Producer; Chief Executive Officer at PATTERN

Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

Joseph Stiglitz

American Economist, Professor at Columbia University & Nobel Memorial Prize in Economic Sciences 2001

Mark Cuban

Serial Entrepreneur, Investor & Owner of the Dallas Mavericks

Michael W. Twitty

Culinary Historian & Author of "Rice: a Savor the South cookbook" (Savor the South Cookbooks)

Michael Twitty Teaches Tracing Your Roots Through Food

Chelsea Handler

Comedian, TV Personality & Author

Patricia Arquette

Academy Award-Winning Actress, Activist, Humanitarian & Author

Andrea Mitchell

Host of MSNBC’s "Andrea Mitchell Reports" & Chief Foreign Affairs Correspondent for NBC News

Andrea Mitchell - Celebrating 15 years of "Andrea Mitchell Reports"

Juan Williams

New York Times Best-Selling Author, Fox News Political Analyst, Co-Host of "The Five" & Award-Winning Columnist

Jon Steinberg

CEO of Future Plc., Founder of Cheddar; Former President & COO of Buzzfeed; Former CEO of Daily Mail.com in North America

Chella Man

Transgender Model, Activist & Artist

I Always Knew Gender Was Fluid | It Gets Better: Chella Man

Amy Goodman

Host & Executive Producer, Democracy Now!

Monica Lewinsky

Producer, Social Activist, Contributing Editor to Vanity Fair, Expert on Cyberbullying, Women's Issues & Reinvention

Monica Lewinsky Suits Up for Reformation's New Power Voting Campaign

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Jonah Edelman

Advocate for Public Education, CEO of Stand for Children