Ed Begley Jr.

Environmental Activist & Emmy Award-Nominated Actor

Simon Lovell

English Comedy Magician, Card Shark Actor and Con Man

Dr. Tierney Thys

Marine Biologist, Educator & Filmmaker

Dyan deNapoli

Penguin Expert, TED Speaker & Award-Winning Author of "The Great Penguin Rescue"

Michael Archer

Paleontologist Michael Archer is working to bring back his favorite extinct animal: the Tasmanian tiger.

Jenna Marbles

YouTube Sensation

Elaine Hendrix

Actress & Animal Activist; Known for her Role in the Remake of "The Parent Trap"

Selenis Leyva

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

Tamar Geller

Dog Trainer, New York Times Bestselling Author who developed "The Loved Dog" a revolutionary method of dog training

Ashley Madekwe

Actress & Personal Style Blogger ; Best known for her role on ABC's "Revenge"

Lo Bosworth

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

Sy Montgomery

Naturalist, Adventurer & Author of "The Good Good Pig" & "The Soul of an Octopus"

Secrets of the Octopus

Lucy King

Human-Elephant Coexistence Director

Nick Jans

Nature Writer & Photographer; Bestselling Author of "A Wolf Called Romeo"

Linda Eder

American singer and actress. She made her Broadway debut in the musical Jekyll & Hyde, for which she received the Theatre World Award for Best Actress in a Musical.

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"

Dina Manzo

Event Planner; Interior Designer; Cast Member of The Real Housewives of New Jersey

Gilles Marini

Actor, Philanthropist, Adventurer

David Mizejewski

National Wildlife Federation Naturalist & Media Personality

Brian Hare

Co-founder of Dognition & Associate Professor of Evolutionary Anthropology at Duke University, Author of "The Genius of Dogs"