Selenis Leyva

Cuban-American Actress Known for Her Role as Gloria in "Orange is the New Black"

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Jim O'Heir

Actor Starring in the NBC Comedy Series "Parks and Recreation"

Danny Trejo

Actor, Author, Activist & Restaurateur; Recovery & Intervention Counselor for Troubled Youth

Sonja Morgan

As the break out star and the woman everyone would most want as a friend on Bravo’s “Real Housewives of NYC,” Sonja Tremont-Morgan represents “housewife” in every sense of the word.

Lisa Vanderpump

Entrepreneur, TV Personality, Author & Philanthropist

Lisa Vanderpump Tells Us About Her First Times

Sophia Bush

Actress, Humanitarian & Author

Jackson Galaxy

Host, "My Cat from Hell" & Author, "Cat Daddy: What the World's Most Incorrigible Cat Taught Me About Life, Love, and Coming Clean"

Matt Damon

Actor, Screenwriter & Producer; Co-Founder of Water.org; Expert Advocate on Global Water & Sanitation Crisis

Joel Sartore

National Geographic Photographer & Author

Maggie Q

TV & Film Actress, Known for Lead Role in CW's "Nikita"

Eric Stonestreet

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

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Cesar Millan

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

Lo Bosworth

Entrepreneur & Lifestyle Personality, Author, and Alum of MTV’s Reality Show, "The Hills"

Robert Ballard

Renowned Ocean Explorer & Scientist

David Suzuki

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

Ian Somerhalder

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

Stefanie Powers

Emmy Award-Nominated Actress & Wildlife Conservationist

Adrian Grenier

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