Dan Heath

Bestselling Author, Senior Fellow at Duke University’s CASE Center & Co-Founder of Thinkwell

Daniel Dae Kim

Actor, Director & Producer

Daniel Tosh

Comedian & Host of "Tosh.0"

Darius Rucker

Lead Singer and Rhythm Guitarist of the Rock Band Hootie & the Blowfish

Darren Criss

Actor, Musician, Songwriter; Best known for his role on "Glee"

David Mamet

Pulitzer Prize-Winning Playwright

Debbie Gibson

Singer-Songwriter and Reality TV Star; "Only In My Dreams"

Demetri Martin

Comedian & Actor Known for Netflix's "The Overthinker;" Former Contributor on "The Daily Show"

Deval Patrick

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

Dick Costolo

Former CEO of Twitter and Co-Founder of Feedburner

Don Cheadle

Actor, Activist & Author; Known for "Iron Man 2" & "Hotel Rwanda"

Donald Glover

Award-Winning Actor, Comedian, Writer, Director & Musician; Performs as Childish Gambino

Donald Sutherland

Actor

Douglas Conant

Chairman, Avon Products; Founder & CEO, Conantleadership; Chairman, Kellogg Executive Leadership Institute at Northwestern University; Former CEO & President, Campbell Soup Company

Dr. Dean Ornish

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

Dr. Hansjörg Leichsenring

Expert on Digital Banking, Innovation, Change Management, Blogger, Author, Keynote Speaker, Bank Manager & Consultant

Dr. Herminia Ibarra

Professor of Organizational Behavior at London Business School & Best-Selling Author

GRACE under pressure: John Baldoni with Herminia Ibarra

Dr. John Kao

Chairman, Institute for Large Scale Innovation, Bestselling Author of "Innovation Nation" and "Jamming: The Art and Discipline of Business Creativity"

Drew Houston

Co-Founder & CEO of Dropbox

Dusty Baker

Former MLB Outfielder; Manager of the Houston Astros