David Agus

Co-Founder of Navigenics, Author of "The End of Illness" & Host of "The Checkup with Dr. David Agus"; Professor of Medicine & Engineering at the University of Southern California

The Book of Animal Secrets

Mark Ballas

Dancing with the Stars Champion & Mental Health Activist

Tony Horton

Fitness Expert & Founder of Fitness Program P90X

Crush It!: The Revolutionary Fitness Plan for All Levels That Burns Fat, Builds Muscle,...

Dr. Lisa Masterson

OB/GYN, Mom, Philanthropist & Author; Known as Co-Host of "The Doctors"

Nia Long

NAACP Image Award-Winning Television & Film Actress, Philanthropist

Gabby Douglas

First African-American to Win Olympic Gold Medal for Gymnastics; Author of New York Times Bestseller "Grace, Gold & Glory: My Leap of Faith"

Sherry Lansing

Former CEO of Paramount Pictures & Founder of The Sherry Lansing Foundation

Greg Louganis

4x Olympic Gold Medal Diver; LGBTQ Activist & Author

Lisa Ling

Award-Winning Journalist & Producer for CBS News

Dolvett Quince

Fitness Guru & Trainer from "The Biggest Loser"

Josh Peck

Actor & Social Media Influencer

Richard Blais

Chef, Culinary Designer & Winner of Bravo's "Top Chef All Stars"

John Ratzenberger

Emmy-Nominated Actor, Entrepreneur & Philanthropist

Mira Sorvino

Academy Award-Winning Actress & United Nations Goodwill Ambassador on Human Trafficking

Ben Stein

Political Economist, Commentator, Author & Actor

Henry Winkler

Actor, Producer, Director & Best-Selling Author; Best Known for "Happy Days"

Melissa Rivers

Actress, Television Host & Producer, Equestrienne, and Philanthropist; Daughter of Late Comedian Joan Rivers

Vince Gilligan

Creator, "Breaking Bad" & "Better Call Saul"

Jonathan and Drew Scott (The Property Brothers)

Hosts of HGTV's "Property Brothers"

Kay Warren

Christian Author