Jeffrey Tambor

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

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"

Alicia Silverstone

Actress & Animal Rights Activist

Dan Abrams

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

Andy Samberg

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

Tracee Ellis Ross

Actress, Producer; Chief Executive Officer at PATTERN

Sarah Michelle Gellar

Television & Film Actress, Co-Founder of Foodstirs

Paul Reiser

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

Natalie Portman

Award-Winning Actress Known for "Black Swan," "V for Vendetta" & Playing Padmé Amidala in the Star Wars Prequel Trilogy

Natalie Portman on self-confidence and performing from an early ...

Debra Messing

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

Bill Maher

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

Robert Klein

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

Jason Alexander

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

Emmy Rossum

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

Nikki Reed

Actress, Singer-Songwriter & Model; Founder & CEO of Eco-Sustainable Fashion Brand Bayou With Love; Autism & Environmental Advocate

Lea Michele

American Actress Best Known For Fox's "Glee" and "Scream Queens"

Elizabeth Banks

Actress Best Known for "The Hunger Games" Series and "Pitch Perfect"

Melissa Gilbert

Actress, Author, Activist

Melissa Rauch

Actress, Writer & Stand-Up Comic, Best known for "The Big Bang Theory"

Marlee Matlin

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

Chelsea Handler

Comedian, TV Personality & Author

Rashida Jones

Actor, Writer and Producer; Best Known for Roles in "The Office" & "Parks and Recreation"

Joseph Gordon-Levitt

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

Ashley Tisdale

Actress, Singer & Producer

Kelly Osbourne

Fashion Designer, Singer & Actress; Former Contributor to E!'s "Fashion Police"; Daughter of Ozzy and Sharon Osbourne

Patricia Arquette

Academy Award-Winning Actress, Activist, Humanitarian & Author

Justice Alan Page

Retired Minnesota Supreme Court Justice & Former Professional Football Player

Philip Yancey

Christian Author

Ann Mullen

Sociology Professor at the University of Toronto; Social & Gender Inequality Researcher; Author of "Degrees of Inequality"