Bob Harper

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

Bethenny Frankel

Entrepreneur, Reality TV Star & Bestselling Author; Founder of Skinnygirl & BStrong Disaster Relief

Tunde Oyeneyin

Peloton Instructor & Makeup Artist; Founder of SPEAK Instagram Live Series

Anderson Cooper

Journalist, TV Personality, Anchor of CNN's "Anderson Cooper 360°"

Cynthia Nixon

Actress Known for her Role as Miranda Hobbes on HBO's "Sex and the City"; Former Candidate for Governor of New York

Nina Garcia

Editor-In-Chief of Elle Magazine, Judge on "Project Runway;" Alzheimer's Awareness & Prevention Advocate

Meghan McCain

Political Columnist, Author & Award-Winning Blogger

Dan Abrams

Chief Legal Affairs Anchor at ABC News & Founder of Abrams Media

Brooke Shields

Actress, Model, Author & Entrepreneur; Podcast Host of "Now What? With Brooke Shields"; Women's Health, Aging & Mental Wellness Advocate

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 ...

Sarah Silverman

Stand-Up Comedian, Actress, Singer, Producer & Writer

Jon Stewart

Talk Show Host, Comedian & Producer

Earth (the Book): A Visitor's Guide to the Human Race. Written and Edited by Jon Stewar...

Ginger Zee

Chief Meteorologist for ABC News, Author & Mental Health Advocate

Chasing Helicity: Through the Storm (The Chasing Helicity Series) (Chasing Helicity Ser...

Dan Harris

Award-Winning ABC News Anchor & #1 New York Times Best-Selling Author

Keith Ablow

America's Psychiatrist

Al Franken

Former Senator from Minnesota; Former SNL Writer; SiriusXM Radio Show Host

Gabourey Sidibe

Actress, Director, & Author Known for "Empire" & "Precious"

Katie Holmes

Award Winning Actress and Producer

Anthony Rapp

Actor, Singer & Author of "Without You: A Memoir of Love, Loss, and the Musical Rent"

Zosia Mamet

Actress Known for Her Role in HBO's "Girls"