Alicia Silverstone

Actress, Animal Rights Activist, Bestselling Author

Love for all Species with Ingrid Newkirk and Peter Singer | The Real Heal with Alicia S...

Debra Messing

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

Joseph Gordon-Levitt

Founder of HitRecord & Actor Known for "Inception" & "The Dark Knight Rises"

Gloria Steinem

Feminist Writer, Activist & Organizer; Co-Founder of New York Magazine & Ms. Magazine

Joseph Stiglitz

Nobel Prize Winner; American Economist; Professor at Columbia University

Jason Alexander

Actor, Writer & Director; Best Known for His Work on "Seinfeld"

Mark Cuban

Serial Entrepreneur, Investor & Co-Founder of Cost Plus Drugs; Former Shark on ABC's "Shark Tank"

Mark Cuban | SXSW

Mayim Bialik

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

Chelsea Handler

Comedian, Television Host, New York Times Best-Selling author & Advocate

I'll Have What She's Having

Andy Samberg

Actor, Comedian, Rapper & Writer; Known for "Saturday Night Live" & "Brooklyn Nine-Nine"

Dan Abrams

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

Josh Ostrovsky

Social Media Celebrity & Comedian; Best Known as "The Fat Jewish"

Josh Ostrovsky - NBC/"TODAY"

Sarah Michelle Gellar

Television & Film Actress, Co-Founder of Foodstirs

Marlee Matlin

Academy Award Winning Actress; Healthcare Advocate & Disability Rights Activist Fighting for Better Access for the Deaf

Daniel Altman

Global Economist, Strategy Expert, Sports Analytics Pioneer

Judy Blume

Children & Young Adult Novelist & New York Times Bestsellers Known for "Are You There God? It's Me, Margaret" and "In the Unlikely Event"

Joyce Maynard

Journalist & Bestselling Author

How the Light Gets In: A Novel

Larry Miller

Actor Known for "Princess Diaries" & "10 Things I Hate About You;" Comedian, Humorist & Author of "Spoiled Rotten America"

Robert Klein

Stand-Up Comedian, Singer & Actor

The Amorous Busboy of Decatur Avenue: A Child of the Fifties Looks Back

Natalie Portman

Academy Award-Winning Actress Known for "Black Swan," "V for Vendetta," the "Star Wars" Prequel Trilogy & "May December"; Women in STEM Advocate & Animal Rights Activist