Laura Snyder

Professor; Science Historian; Philosopher; Author of "The Philosophical Breakfast Club"

Norman Ornstein

Bestselling Author, Political Analyst & Resident Scholar at the American Enterprise Institute

Jason Lezak

Olympic Gold Medalist Swimmer; Tri-Captained 2008 Beijing Olympic Team with Michael Phelps

Ben Feldman

Actor, Plays 'Michael Ginsberg' on AMC's "Mad Men" and Comedy Show, "Superstore"

Robert Klein

Comedian and Actor Known for his Wry Wit and Unique Brand of Humor

Charles Best

Founder and Former CEO, DonorsChoose.org

From Classroom To Crowdfunding

Dan Abrams

Chief Legal Affairs Anchor at ABC News & Founder of Abrams Media

Mark Spitz

Legendary Olympic Swimmer; Third Athlete to Win Nine Olympic Gold Medals

Mark Spitz on the 1972 Olympic Games in Munich

Alicia Silverstone

Actress & Animal Rights Activist

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"

Patricia Arquette

Academy Award-Winning Actress, Activist, Humanitarian & Author

Emmy Rossum

Actress Known for Showtime's "Shameless" & Singer-Songwriter

Aly Raisman

Olympic Gymnast, Gold Medalist, Captain of the "Fierce Five" & the "Final Five"

Debra Messing

Emmy Award-Winning Actress & Global Ambassador for PSI/Youth AIDS

Rob Schneider

Emmy-nominated Actor, Comedian & Screenwriter; Former SNL Cast Member

Paul Reiser

Actor, Writer & Stand-Up Comedian Known for Portraying Paul Buchman in "Mad About You"

Jeffrey Tambor

Emmy Award-Winning Actor of "Arrested Development," "The Hangover" & "Transparent"

Mayim Bialik

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

Chelsea Handler

Comedian, TV Personality & Author

Sarah Michelle Gellar

Television & Film Actress, Co-Founder of Foodstirs