Jason Alexander

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

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

Debra Messing

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

Dan Abrams

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

Sarah Michelle Gellar

Television & Film Actress, Co-Founder of Foodstirs

Laura Snyder

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

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"

Norman Ornstein

Best-Selling Author, Political Analyst & Resident Scholar at the American Enterprise Institute

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

Tracee Ellis Ross

Actress, Producer & Chief Executive Officer at PATTERN

Tracee Ellis Ross: A woman's fury holds lifetimes of wisdom | TED

Andrea Mitchell

Chief Foreign Affairs Correspondent & Chief Washington Correspondent for NBC News

Alicia Silverstone

Actress, Animal Rights Activist, Bestselling Author

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

Mark Spitz

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

Aly Raisman

Two-Time Olympian & Six-Time Medalist; Third Most Decorated American Gymnast of All Time; NYT Bestselling Author, "Fierce"; Sexual Abuse Awareness Advocate

Patricia Arquette

Academy & Emmy Award-Winning Actress Known for "Boyhood," "Medium" & "The Act"; Co-Founder of GiveLove; Gender Equality & LGBTQ Rights Activist

Rob Schneider

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

Ben Feldman

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