Ellen DeGeneres

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

Laura Dern

Actress, Director, Producer & Activist

Bill Maher

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

Ian Somerhalder

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

Willie Nelson

Country Music Singer-Songwriter Known for "On The Road Again" & "Always On My Mind"

Brad Pitt

Actor, Producer, Philanthropist & Environmental Activist

Kristin Cavallari

TV Personality, Fashion Designer, Bestselling Author & Founder of the Lifestyle Brand Uncommon James

True Comfort: More Than 100 Cozy Recipes Free of Gluten and Refined Sugar: A Gluten Fre...

Lisa Vanderpump

Entrepreneur, TV Personality, Author & Philanthropist

Lisa Vanderpump Tells Us About Her First Times

Pink

Singer-Songwriter, Actress, Philanthropist & Environmental Activist

Kristen Bell

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

Charlize Theron

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

Pierce Brosnan

Actor, Producer & Activist; Best Known for His Role as James Bond

Pamela Anderson

Actress, Model, Producer & Animal Rights Advocate

Hilary Swank

Academy Award-Winning Actress; Best known for her roles in 'Million Dollar Baby' and 'Boys Don't Cry'

Tom Hardy

English Actor Known for "This Means War," "The Dark Knight Rises," "Inception." & "Mad Max"

Martin Sheen

Award-Winning Actor Known for "The West Wing" & "Grace and Frankie;" Social Activist & Humanitarian

Sarah McLachlan

Singer-Songwriter & Activist

Eric Stonestreet

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

Leona Lewis

Singer, Songwriter & Animal Welfare Activist; Best Known for "Bleeding Love"

David Duchovny

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