Dean Karlan

Economics Professor, Poverty Alleviation Expert, Nonprofit Founder

Dean Karnazes

The “Ultramarathon Man”, Ran 3,000 Miles Across the Country with Live! with Regis and Kelly’s “Run Across America” in 2011

Debbie Gibson

Singer-Songwriter, Record Producer, Actress

Demetri Martin

Comedian & Actor; Performed in Several Netflix Specials Including "Demetri Deconstructed"; Known for His Deadpan Delivery

Demetri Martin Forgot You Can't Pee in New York

Denise Austin

Fitness Expert, Video Hall of Fame Inductee, Author

Dennis Mannering

Business Motivator on the Topics of Leadership, Sales and Customer Service

Desi Williamson

Corporate Executive, Entrepreneur, Addiction Counselor

Deval Patrick

Two-term Governor of Massachusetts, Civil Rights Attorney & Business Leader

Dewitt Jones

Motivator, Photojournalist, Film Director & Writer

Nat Geo Photographer Captures The Beauty That Transcends Our Differences

Dick Costolo

Former CEO of Twitter, Founder of 01 Advisors, Venture Partner

Dominique Wilkins

NBA Hall of Famer, Businessman, Philanthropist

Don McMillan

Corporate Comedian Known for his 'Nerdy' Sense of Humor

Donald Glover

Award-Winning Actor, Comedian, Writer, Director Known for "Atlanta," "Community" & "Mr. & Mrs. Smith"; Grammy Award-Winning Musician Formerly Known as Childish Gambino

Donald Sadoway

Award-Winning Inventor & Professor Emeritus of Materials Chemistry at MIT; Expert in Batteries & Green Metals Production

Dr. Alan Zimmerman

Interpersonal Communications Expert, Best-Selling Author, Leadership Consultant

Dr. Dean Ornish

Physician, Leading Researcher in Healthcare, Founder of the Preventive Medicine Research Institute & Bestselling Author

Everyday Cooking with Janet Fletcher, Jean-Marc Fullsack and Helen Roe

Dr. Gregory Stock

Biotech Entrepreneur; Bestselling Author; CEO of Socratic Sciences; Founding Co-Director of Precision Wellness Center at Mt. Sinai Medical School

Dr. Inge Auerbacher

Holocaust Survivor, Chemist, Award-Winning Author

Dr. James B. Maas

Psychology Professor, Sleep Research Expert, Best-Selling Author

Dr. M. Joycelyn Elders

Former Surgeon General of the United States