Tim Grover

CEO of Attack Athletics, Best-selling Author of "Relentless" and "Jump Attack"

Monica Lewinsky

Producer, Social Activist, Contributing Editor to Vanity Fair, Expert on Cyberbullying, Women's Issues & Reinvention

Monica Lewinsky Suits Up for Reformation's New Power Voting Campaign

Dan Harris

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

Amy Robach

Co-Host of "Amy & T.J. Podcast"; Former Co-Host of "20/20" & Former ABC News Correspondent for "Good Morning America;" Breast Cancer Survivor

Dr. Joel Selanikio

Award-Winning Physician, Health & Technology Activist, CEO of Magpi & Founding Member of WHO’s Digital Health Roster of Experts

Josh Peck

Actor & Social Media Influencer

David Zinczenko

Founder & CEO of Galvanized; Former Vice President of Men's Health, Women's Health & Prevention; Retired Nutrition & Wellness Editor at ABC News

Dara Torres

12x Olympic Medalist, NYT Bestselling Author, Entrepreneur & Healthcare Reform Advocate

Dr. Tererai Trent

Internationally Recognized Voices for Quality Education and Women’s Empowerment; Oprah Winfrey's "All-Time Favorite Guest"

Dr. Lisa Masterson

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

Patrick Kennedy

Former Congressman (D-RI); Founder of The Kennedy Forum; Co-Founder of One Mind

Profiles in Mental Health Courage

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"

Randi Zuckerberg

CEO & Founder of Zuckerberg Media; Bestselling Author; Business Radio Show Host

Ray Lewis

Celebrated NFL Linebacker, The Ray Lewis Family Foundation Founder & ESPN Commentator

Peyton Manning & Ray Lewis reminisce on their playing days

Natasha Lyonne

Emmy Nominated Actress; Known for "American Pie," "Orange Is the New Black" & "Russian Doll"

Amy Purdy

Former "Dancing with the Stars" Contestant & Paralympic Professional Snowboarder

Jennifer Arnold

Co-Star of TLC’s "Little Couple," Neonatologist, Cancer Survivor & Author of "Life is Short"

Shawn Achor

Harvard Professor, Researcher, Positive Psychology Expert, Author of "The Happiness Advantage" & "Big Potential"

Herman "Herm" Edwards

Former Arizona State Head Football Coach, Former ESPN Football Analyst, NFL Head Coach and Player

Chade Meng Tan

Chief Happiness Officer, Google; Award-winning Entrepreneur and NYC Best-Selling Author