Ken Burns

Historian & Award-Winning Documentary Filmmaker

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Graham Hill

Founder of Life Edited & TreeHugger.com

John Ratzenberger

Emmy-Nominated Actor, Entrepreneur & Philanthropist

Cynthia Lowen

Filmmaker of Bully & Poet

Alicia Silverstone

Actress & Animal Rights Activist

Bob Schieffer

Former Moderator of “Face The Nation” & Chief Washington Correspondent for CBS News

Joe Pantoliano

Emmy Award-Winning Actor & Film Producer; Mental Health Advocate

Spike Lee

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

Danny Boome

Star of Food Network's "Rescue Chef"

Ed Begley Jr.

Environmental Activist & Emmy Award-Nominated Actor

Elizabeth Cohen

Senior Correspondent for the CNN Health, Medical, & Wellness Unit

Elizabeth Cohen - CNN news story on baby formula shortage

Daphne Oz

Emmy Award-winning Television Host, New York Times Bestselling Author, Chef & Entrepreneur

Danny Glover

Acclaimed Actor, Producer & Leading Social Activist

Jesse Dylan

Founder/CEO of Wondros & Filmmaker

Giuliana Rancic

Entertainment Journalist & Breast Cancer Survivor

Jeff Jarvis

Leader in the Development of Online News & Blogging; Director of the Tow-Knight Center for Entrepreneurial Journalism at CUNY

Calvin Trillin

Author, Columnist, Humorist & Political Satirist

Jeffrey Tambor

Emmy Award-Winning Actor of "Arrested Development," "The Hangover" & "Transparent"

Ben Stein

Political Economist, Commentator, Author & Actor

Rosie Perez

Actress, Choreographer, Activist & Former Co-Host of "The View"

Van Jones

CEO of REFORM Alliance, CNN host, Emmy Award-winning Producer & NY Times Best-Selling Author

Bob Harper

Personal Trainer & Former Host of "The Biggest Loser;" Heart Attack Survivor

Maintaining A Healthy Body & Mind | Bob Harper Q&A

Jonathan Safran Foer

Bestselling Author of "Everything Is Illuminated" and "Extremely Loud and Incredibly Close"

Richard Dreyfuss

Academy Award-Winning Actor

Jason Alexander

Actor, Writer & Director; Best Known for His Work on "Seinfeld"

Jose Antonio Vargas

Journalist, Filmmaker & Immigration Activist

Mayim Bialik

Neuroscientist, Mental Health Advocate & Actress Known for "The Big Bang Theory"

Edward Norton

Award Winning Actor & Filmmaker

Jurnee Smollett

Actress & Singer