Shawn Achor

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

Shawn Achor on happiness as a competitive advantage

Sophia Amoruso

Founder & Former CEO of Nasty Gal; New York Times Best-Selling Author of "#GIRLBOSS"

Andie MacDowell

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

Ashley Judd

Actress, Activist & Humanitarian

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

Benjamin Zander

Conductor of the Boston Philharmonic Orchestra; Celebrated Leadership & Performance Expert

Cecily Strong

Actress, Comedian, "Saturday Night Live" Cast Member & Former Co-Anchor of "Weekend Update"

Cecily Strong's Idris Elba Impersonation That Never Made It to SNL

Danny Meyer

Founder, Shake Shack

Danny Meyer: How to Use Hospitality in Business to Gain and Keep ...

David McCullough

Historian and Bestselling Author

Viola Davis

Academy Award-Winning Actor, Producer & Philanthropist

Viola Davis Opens Up About Surviving Childhood Poverty, Her ...

Dom Sagolla

Co-Creator of Twitter; Author of "140 Characters"

Ree Drummond

Host of "The Pioneer Woman" on the Food Network

Gary Sinise

Actor & Advocate for America's Servicemen and Women; Founder of the Gary Sinise Foundation

George Takei

Actor Known for His Role in "Star Trek;" LGBTQ & Japanese-American Civil Rights Activist

George Takei on why the original ‘Star Trek’ never featured a gay character

Giuliana Rancic

Entertainment Journalist & Breast Cancer Survivor

Guy Kawasaki

Chief Evangelist of Canva & Executive Fellow of the Haas School of Business (UC Berkeley); Former Chief Evangelist of Apple

Ian Somerhalder

Actor Known for "The Vampire Diaries;" Animal & Environmental Advocate; Founder of The Ian Somerhalder Foundation

Josh Radnor

Actor, Director, and Co-Star of the Hit CBS sitcom, "How I Met Your Mother"

Kal Penn

Actor, Writer, Producer & Former Associate Director of the White House Office of Public Engagement

Spike Lee

Academy Award-Winning Writer, Producer, Actor & Director; Best Known for "BlacKkKlansman" & "Malcolm X"

Spike Lee to Receive American Cinematheque Award

Lin-Manuel Miranda

Tony Award-Winning Actor, Composer, & Lyricist; Known for "In The Heights," "Bring it On the Musical," & "Hamilton"

Nia Long

Television & Film Actress, Philanthropist

Marcus Samuelsson

James Beard Award-Winning Chef & Owner of the Red Rooster Restaurant

Thomas Middleditch

Actor, Voice Actor, Comedian, Screenwriter Known for "Silicon Valley"

Nev Schulman

Producer, Actor, Photographer & TV Host Known for MTV's "Catfish: The TV Show"

Robin Roberts

Award-Winning Co-Anchor on ABC's "Good Morning America;" Breast Cancer & MDS Survivor

Ronda Rousey

UFC Champion, Olympic Medalist, Actor & Author

Simon Sinek

World-Renowned Leadership Expert & Best-Selling Author