Adrian Grenier

Actor Known for HBO's "Entourage"; Environmental Activist; UN Ambassador

Alex Honnold

Professional Rock Climber & Star of the Academy-Award Winning Documentary "Free Solo"

Brad Pitt

Actor, Producer, Philanthropist & Environmental Activist

Carrie Ann Inaba

"Dancing with the Stars" Judge, Founder of Carrie Ann Inaba Animal Project

Charlize Theron

Academy Award-Winning Actress; Best Known for "Monster" & "Mad Max: Fury Road"

Darin Olien

Co-Host of Netflix "Down To Earth" with Zac Efron, Best-Selling; Original Formulator of "Shakeology;" Healthy Living & Superfoods Expert

David Duchovny

Actor, Writer & Director Known for "The X-Files," "Aquarius" & "Californication"

Edie Falco

Actress, Known for "The Sopranos" & "Nurse Jackie"

Ellen DeGeneres

Award-Winning Comedian, TV Host, Actress & LGBTQ Activist

Joe Tessitore

Play-by-Play Commentator, Studio Host

Kristen Bell

Actress & Film Producer; Known for "Veronica Mars" & "Frozen"

Laura Dern

Actress, Director, Producer & Activist

Quannah Chasinghorse

Indigenous Activist & Model

Quannah ChasingHorse on Representation, Climate Exploitation

Robert Irwin

Wildlife & Nature Conservationist, Photographer, Author, and TV Personality; Son of Steve Irwin, Owner of Australia Zoo

Robert Irwin Reveals His Most Feared Animal! | The Cheap Seats