John Oliver

Emmy-Winning Comedian, Best Known for "The Daily Show with Jon Stewart" & "Last Week Tonight"

Tracee Ellis Ross

Actress & Youth Volunteer, Star of "Black-ish"

Jay Leno

TV Late Night Show Host, Stand-Up Comedian & Best-Selling Author

John Mulaney

Stand-Up Comedian & Former Writer for "Saturday Night Live"

Leslie Jones

Stand-Up Comedian & Actress; Former Cast Member on "Saturday Night Live"

Leslie Jones to Host 2020 Emmy Awards Nominations

Demi Lovato

Grammy Nominated Singer-Songwriter, Musician, Philanthropist & Mental Health Advocate

Jessica Alba

Actress; Entrepreneur; Founder & CEO of The Honest Company

Ben McKenzie

Actor; Known for his role on "The OC," "Southland" and "Gotham"

Sofia Vergara

Actress, Entrepreneur, Comedian Known for "Modern Family"

Blake Lively

Actress and Founder of Preserve

Ashton Kutcher

Actor, Producer, Investor & Activist

Bruno Mars

Grammy Award-winning Singer-Songwriter & Record Producer

Arnold Schwarzenegger

Actor, Producer, Director, Writer; California’s 38th Governor; Host of "Celebrity Apprentice"

Conan O'Brien

Comedian, Writer & Host of "Conan"

Pharrell Williams

Singer-Songwriter, Producer & Entrepreneur; Known for the Hit Single, "Happy"

Michael J. Fox

Award-Winning Actor, Author, Producer & Advocate

Michael J. Fox no longer pursuing acting gigs amid battle with Parkinson's disease

Donald Trump

45th President of the United States; Businessman & TV Personality

Susan Sarandon

Academy-Winning Actress & Activist

Rosie O'Donnell

Comedian, Actress, Author & Television Personality

Rosie O'Donnell Returns, With Guests in the Basement and the ...

Bill Maher

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