Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

Ben Stein

Political Economist, Commentator, Author & Actor

Nev Schulman

Producer, Actor, Photographer & TV Host Known for MTV's "Catfish: The TV Show"

B.J. Novak

Actor, Writer & Comedian Known for "The Office"

Sophia Bush

Actress, Humanitarian & Author

Ashley Judd

Actress, Activist & Humanitarian

George Takei

Actor, Social Justice Activist & Social Media Mega-Power

Spike Lee

Academy Award-Winning Writer, Producer, Actor & Director; Best Known for "BlacKkKlansman" & "Malcolm X"

Ian Somerhalder

Actor Known for "The Vampire Diaries;" Animal & Environmental Advocate; Founder of The Ian Somerhalder Foundation

Aasif Mandvi

Comedic Actor & Former Correspondent for "The Daily Show"

Aasif Mandvi Shares How Fatherhood Saved Him from FOMO

Bill Hader

Actor, Comedian, Writer, Producer, Director, Known for "Saturday Night Live"

Josh Altman

Successful Real Estate Agent & Star of Bravo's "Million Dollar Listing"

Retta

Stand-Up Comedian & Actress Known for "Parks and Recreation"

Retta Shares the Ugly Sides of Filming HGTV's Ugliest House in America

Mira Sorvino

Academy Award-Winning Actress & United Nations Goodwill Ambassador on Human Trafficking

Oscar winner Mira Sorvino on "Most Guys Are Losers" and her career

Maysoon Zayid

Palestinian-American Actress, Writer, Comedian, Disability & Anti-Cyber Bullying Advocate

Rita Moreno

Award-Winning Actress, Dancer & Singer; New York Times Best-Selling Author

Kate McKinnon

Emmy Award-Winning Comedian & Former Cast Member of "Saturday Night Live"

Jay Pharoah

Actor, Stand-Up Comedian & Impressionist; Former Saturday Night Live Cast Member

Max Greenfield

Actor Known For "New Girl"

Kevin Spacey

Two-Time Academy Award-Winning Actor, Director, Producer, Screenwriter and Singer; Best Known For His Roles in "American Beauty" and Netflix's "House of Cards"