Jim Abbott

Former One-Handed Major League Baseball Pitcher

Shawn Achor

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

Shawn Achor on happiness as a competitive advantage

Adam Garone

Former CEO of the Movember Foundation

Patch Adams

Physician & Clown; Founder of Gesundheit Institute; Inspiration for the Robin William's Movie "Patch Adams"

Michelle Aguilar

Winner of NBC's "The Biggest Loser" Season 6, Author, Motivational Speaker

David Agus

Professor of Medicine and Engineering at the University of Southern California, Co-Founder of Navigenics & Author of "The End of Illness"

Dr. David Agus Gives an Optimistic Outlook for COVID-19 Pandemic

Ali Vincent

First Female Winner of "The Biggest Loser"

Jeff Allen

Stand-up Christian Comedian; Marriage Motivator

Debbie Allen

Creative Marketing Expert & Business Speaker

Allison Massari

Executive Coach, Entrepreneur, Visual Artist & Burn Survivor; Top Speaker on Resilience, Change & Overcoming Adversity

John Amatt

Mountaineer, Founder & President of One Step Beyond WorldWide

Amy Purdy

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

Paralympian Amy Purdy Eyes The Future Of Adaptive Action Sports

Louie Anderson

Stand-Up Comedian, Actor and Television Host

Andie MacDowell

Actress Known for "Four Weddings & a Funeral;" Heart Health Activist

Anthony Atala

Director, Wake Forest Institute for Regenerative Medicine

Michael C. Anthony

Bestselling Author, Body Language Expert & Kidney Disease Survivor

Jennifer Arnold

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

Jeff Arnold

CEO & Chief Architect of Sharecare; Former CEO of Howstuffworks and WebMD Corporation

Ashley Judd

Actress, Activist & Humanitarian

Ashley Judd: Women, we are in the fight of our lives

Dr. Holly G. Atkinson

Award-Winning Medical Journalist