Amy Purdy

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

Andy Cohen

Emmy Award-Winning Host & Producer of Bravo’s "Watch What Happens: Live"

Andy Cohen reacts to his infamous New Year’s Eve rant

Anne-Marie Slaughter

Foreign Policy Expert, Author & CEO of New America Foundation

April Ryan

White House Correspondent, MSNBC Political Analyst, D.C. Bureau Chief for TheGrio & Author

Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

Carson Kressley

TV Personality & Fashion Designer; Best Known for "Queer Eye for the Straight Guy"

Diane Guerrero

Immigration Reform Activist & Actress Known for "Orange is the New Black" & "Jane The Virgin"

Dr. Michio Kaku

World-Renowned Futurist & Theoretical Physicist

Giuliana Rancic

Entertainment Journalist & Breast Cancer Survivor

J.R. Martinez

Actor, Best-Selling Author, Motivational Speaker, Advocate & Wounded U.S. Army Veteran

Jennifer Arnold

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

Jill Abramson

Former Executive Editor of The New York Times

Jon Steinberg

CEO of Future Plc., Founder of Cheddar; Former President & COO of Buzzfeed; Former CEO of Daily Mail.com in North America

Judy Smith

America's Premier Crisis Management Expert; Inspiration for ABC's "Scandal"

Judy Smith - Career Advice

Kal Penn

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

Kara Swisher

Host of Sway Podcast, Contributing Opinion Writer, New York Times & Co-Host of Pivot Podcast at New York Magazine and CNN On-Air Contributor

Burn Book: A Tech Love Story

Kate McKinnon

Emmy Award-Winning Comedian & Former Cast Member of "Saturday Night Live"

Lisa Leslie

WNBA Champion, Olympic Gold Medalist & Author of "Don't Let the Lipstick Fool You;" Coach of Ice-Cube's BIG3 Basketball League

Lisa Ling

Award-Winning Journalist & Producer for CBS News

Mitt Romney

Former Governor of Massachusetts, 2012 Republican Presidential Nominee and CEO