Mayim Bialik

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

Patricia Arquette

Academy Award-Winning Actress, Activist, Humanitarian & Author

Jessica Alba

Actress; Entrepreneur; Founder & CEO of The Honest Company

Alicia Silverstone

Actress & Animal Rights Activist

Bill Maher

Political Satirist & Host of HBO's "Real Time"

Sebastian Copeland

Adventurer, Environmental Activist, Award-Winning Photographer, Author, Lecturer & Founder of the Sedna Foundation

Olivia Munn

Television & Film Actress; Known for "Newsroom" & "X-Men: Apocalypse"

Olivia Munn on Jon Stewart | 2022 Mark Twain Prize

Kathy Bates

Academy Award-Winning Actress; Cancer Survivor & Chairperson for the Lymphatic Education & Research Network

Nash Grier

Social Media Guru, Digital Influencer & Environmental Activist

Alyssa Milano

Actress, Author, Philanthropist & Founder of Touch by Alyssa Milano; Known for "Charmed" and "Who's the Boss"

Daryl Hannah

Actress, Best Known for "Kill Bill" & "Splash"; Environmental Activist

Josh Tickell

America's #1 Expert on the Millennials generation. Creator, Director and Star of the movie "FUEL"

Arnold Schwarzenegger

Actor, Producer, Director, Writer; California’s 38th Governor; Host of "Celebrity Apprentice"