Denise Richards

Actress, Former Fashion Model & Reality Star on Bravo's "The Real Housewives of Beverly Hills"

Christian Serratos

Actress, Best-known for her Role in the "The Twilight Saga" Series & "The Walking Dead"

Mena Suvari

Actress Known for "American Beauty" & Author of "The Great Peace: A Memoir"

Lisa Edelstein

Actress, Director, Writer & Producer

Bindi Irwin

Wildlife Conservationist & Daughter of Steve Irwin; Season 21 Contestant on "Dancing With the Stars"

Portia de Rossi

Actress, Known for"Ally McBeal" & "Arrested Development."

Danny Trejo

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

Maggie Q

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

Mo Rocca

CBS News Correspondent & Television Personality; Author of "Mobituaries" and "All the Presidents' Pets"

Theo Rossi

American Actor & Producer; Best Known for "Sons of Anarchy" and Marvel's "Luke Cage"

Paul Rosolie

Conservationist, Writer, Filmmaker, Founder of Junglekeepers, Protecting 55000+ acres of Amazonian Habitat & Wildlife

How creative & emotive communication conserved 55,000 acres of Peru’s Amazon

Alexandra Horowitz

Professor of Psychology, Animal Behavior, and Canine Cognition; Bestselling Author of "Inside of a Dog: What Dogs See, Smell and Know"

Bob Baffert

Legendary Triple Crown-Winning Horse Trainer

Adrienne Maloof

Co-owner of Maloof Companies; Star of "The Real Housewives of Beverly Hills"

Carlton Ward Jr.

Conservation Photographer & National Geographic Explorer; Founder of Florida Wild

Tony Juniper

Writer, Sustainability Advisor, & Environmentalist

Christiana Figueres

Expert on Global Climate Change; Former Executive Secretary of the UN Framework Convention on Climate Change

Steve Winter

Wildlife Photojournalist

Dennis Dimick

Former Executive Environment Editor at National Geographic Magazine

Wade Boggs

National Baseball Hall of Famer, 12-Time MLB All-Star & World Series Champion; Wildlife Conservation Activist