Jillian Michaels

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

Holly Robinson Peete

TV Personality & Autism Advocate

Alicia Silverstone

Actress & Animal Rights Activist

Maureen McCormick

Actress & Author Best Known for "The Brady Bunch"

Daryl Hannah

Actress, Best Known for "Kill Bill" & "Splash"; Environmental Activist

Vicki Lawrence

Actress, Comedian & Women's Activist; Best Known for her Characters on "The Carol Burnett Show"

Wil Wheaton

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

Dr. Drew Pinsky

Physician, Addiction Medicine Specialist, TV Host, Author & Podcaster

Richard Simmons

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

Patricia Arquette

Academy Award-Winning Actress, Activist, Humanitarian & Author

Paula Abdul

American Singer-Songwriter, Dancer, Choreographer & TV Personality

Jodie Sweetin

Entrepreneur, Actress, Producer & Author

Diana Nyad

World Champion Swimmer, Storyteller, Sports Journalist & Broadcaster

Diana Nyad | The High-Performance Teamwork That Helped Her Make History

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

Kelly Osbourne

Fashion Designer, Singer & Actress; Former Contributor to E!'s "Fashion Police"; Daughter of Ozzy and Sharon Osbourne

Kate Walsh

Film & TV Actress known for starring in both "Grey's Anatomy" and "Private Practice"

Marlee Matlin

Academy Award Winning Actress; Healthcare Advocate & Disability Rights Activist Fighting for Better Access for the Deaf

Chaz Bono

Transgender, LGBTQ Rights Advocate, Author, Speaker

Tig Notaro

Grammy Award-Nominated Stand-Up Comic, Writer, Radio Contributor & Breast Cancer Survivor