Lena Dunham

Writer, Director, Actor & Producer Best Known for HBO’s “Girls”

Cesar Millan

Host of The Dog Whisperer; Author of Cesar's Way

Alfre Woodard

Emmy Award-Winning Actress; Human Rights Activist

Ty Burrell

Actor and Activist; Plays Phil Dunphy on ABC's hit show "Modern Family"

David Suzuki

Environmentalist & Scientist; Co-Founder of the David Suzuki Foundation

Denise Austin

Fitness Expert, Author & Video Hall of Famer

Rachel Dratch

Comedian, Actress, and Former SNL Cast Member

Jason Reitman

Academy Award-Nominated Director, Screenwriter & Producer; Best Known for His Work on "Juno" and "Thank You For Smoking"

Mandy Patinkin

Actor Best Known for "Homeland," "Criminal Minds" and "The Princess Bride"

Sandra Lee

Cancer Survivor, Activist, Author, Emmy Award-Winning Television Chef & Home Life Expert

Rx: Early Detection, A Cancer Journey with Sandra Lee | HBO

Nick Kroll

Actor & Comedian; Best Known for "Big Mouth," "Kroll Show" & "The League"

Nick Kroll on Mel Brooks, His Son's First Bday, and more!

Kunal Nayyar

Actor Known for "The Big Bang Theory"

Danny Glover

Acclaimed Actor, Producer & Leading Social Activist; Epilepsy Survivor

Ted Turner

Media Mogul & Philanthropist

Graham Hill

Founder of Life Edited & TreeHugger.com

Danai Gurira

Actress, Best Known for "Black Panther" & "The Walking Dead"

Bo Burnham

Filmmaker, Comedian & YouTuber

Kara DioGuardi

Music Industry Songwriter & Producer

Eric Stonestreet

Actor & Comedian, Best-Known for "Modern Family"

Hannah Storm

Sports Anchor & Advocate