Chrissy Metz

Actress & Singer, Best Known for NBC's "This Is Us"

Jessie Pavelka

Fitness Expert; Former Television Host on NBC’s "The Biggest Loser"

Rachel Frederickson

Winner of "The Biggest Loser" Season 15

Danny Cahill

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

Chris Powell

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

Tory Johnson

Founder and CEO, Women For Hire; Author, "The Shift"; Weekly Contributor, "Good Morning America"

Paula Zahn

Distinguished News Anchor & Nine-Time Emmy Award Winner

Carnie Wilson

Singer & Actress, Founding Member of "Wilson Phillips"

John Sweeney

Inspiring Innovation at the Speed of Laughter

Ruben Studdard

American Idol Winner; The Biggest Loser Contestant; Dubbed the "Velvet Teddy Bear"

Art Smith

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

Richard Simmons

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

Richard Simmons on Motivation - YouTube

Sherri Shepherd

Actress & Comedian, Former Co-host of "The View"; Host, "Two Funny Mamas" Podcast

Jillian Michaels

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

Joan Lunden

Award-Winning Journalist, Bestselling Author & Health and Wellness Advocate

Wynonna Judd

Grammy-Winning Country Superstar, Author and Contestant on "Dancing With the Stars"

Bob Harper

Personal Trainer & Former Host of "The Biggest Loser;" Heart Attack Survivor

Kate Gosselin

Television Personality and Author Known For Her Reality Series "Kate Plus 8"

Valerie Bertinelli

Actress & Jenny Craig Brand Ambassador; Starred in Sitcom "Hot in Cleveland"

One Dish At A Time: Delicious Recipes And Stories From My Italian-american Childhood An...

Anthony Anderson

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