Andy Samberg

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

Leighton Meester

Actress, Singer, Best known as Blair Waldorf in Gossip Girl

Marlee Matlin

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

Ben Feldman

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

Melissa Rauch

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

Tracee Ellis Ross

Actress, Producer; Chief Executive Officer at PATTERN

Joseph Gordon-Levitt

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

Sarah Michelle Gellar

Television & Film Actress, Co-Founder of Foodstirs

Ashley Tisdale

Actress, Singer & Producer

Jeffrey Tambor

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

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"

Debra Messing

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

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

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 ...

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

Tatanka Means

Native American Actor & Stand-Up Comedian

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"

Graeme le Saux

Lead Presenter for NBC’s coverage of the Barclay’s Premier League; England and Chelsea Football Legend

Peter Aiken

Data Management Thought Leader & Founder of Data Blueprint

Anthony Adams

Former Defensive Tackle for the San Francisco 49ers & Host for ABC's "The Great American Baking Show"

Dr. Jawanza Kunjufu

Author, Speaker & Founder of African American Images

Derald Wing Sue

Professor & Author