Jillian Michaels

Leading Fitness Expert, Certified Nutritionist, Renowned Life Coach & Powerful Entrepreneur

Richard Simmons

Fitness Instructor, Actor, Video Producer Known for "Sweatin' to the Oldies" Aerobics Videos

Dr. Ian Smith

Doctor, New York Times Bestselling Author, Medical Contributor & Host of "The Doctors"

Art Smith

Celebrity Chef, Author & Humanitarian; Served as the Personal Chef of Oprah Winfrey

Jackie Warner

Celebrity Trainer & Television Personality

Chris Powell

Trainer and Transformation Specialist on ABC's "Extreme Makeover: Weight Loss Edition"

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 Oz

Best-Selling Author, Producer, Host & Entrepreneur

Michael J. Fox

Actor, Author and Advocate; Founder, The Michael J. Fox Foundation for Parkinson’s Research

Michael J. Fox on latest Parkinson's research and how he's ...

Peter Salgo

Healthcare Futurist, Emmy Award-Winning Health & Science Correspondent & Author of "The Heart of the Matter"

Ellie Krieger

Chef, Nutritionist, Best-Selling Author & Host of “Ellie’s Real Good Food”

Anthony Anderson

Actor, Producer, Comedian, Writer & Game Show Host, Best Known for ABC’s "Black-ish"

Laila Ali

Undefeated Four-Time World Champion Boxer & Lifestyle Expert; Heart Disease Awareness Advocate

Keke Palmer

Actress & Youngest Talk Show Host in TV History

Laverne Cox

Award-Winning Transgender Actress, Producer & Equal Rights Advocate

Robert H. Lustig

Endocrinologist, Professor of Pediatric Endocrinology, New York Times Bestselling Author

Amandla Stenberg

Actor, Singer & Activist Known for "The Hate U Give," "The Hunger Games" & "Everything, Everything"

Danny Cahill

The BIGGEST "The Biggest Loser." Lost 236 pounds in less than 7 months!

Jane Lynch

Emmy Award-Winning Actress, Known for "Glee" and Hosting "Hollywood Game Night"

Terry Crews

Actor, Author & Former NFL Player; Advocate for Women's Rights

Mayim Bialik

Neuroscientist, Mental Health Advocate & Actress Known for "The Big Bang Theory"

Eva Longoria

Award-Winning Actress, Producer, Director, Activist, Philanthropist & Designer

Wil Wheaton

Actor, Author & Blogger; Known for "Star Trek: The Next Generation" & "The Big Bang Theory"

Sean Astin

Actor, Director, Voice Artist & Producer Known For "Lord of the Rings"

Kathy Bates

Academy Award-Winning Actress; Cancer Survivor & Chairperson for the Lymphatic Education & Research Network

Jackie Joyner-Kersee

Olympic Legend, Philanthropist, American Record-Holder in the Long Jump & Founder of the Jackie Joyner-Kersee Foundation

Ann Mullen

Sociology Professor at the University of Toronto; Social & Gender Inequality Researcher; Author of "Degrees of Inequality"

Graeme le Saux

Lead Presenter for NBC’s coverage of the Barclay’s Premier League; England and Chelsea Football Legend

Peter Aiken

Data Management Thought Leader & Founder of Data Blueprint

Anthony Adams

Former Defensive Tackle for the San Francisco 49ers & Host for ABC's "The Great American Baking Show"