Keith Olbermann

Award-Winning Host of "Olbermann"

Apolo Ohno

Eight-Time Olympic Medalist, Top Short-Track Skater in the United States & NYT Best Selling Author

Bill Parcells

Former NFL Head Coach & Pro Football Hall of Fame Inductee

Serena Williams

Iconic Professional Tennis Player & Olympic Gold Medalist; Activist, Philanthropist & Entrepreneur

Sheila C. Johnson

Entrepreneur, CEO of Salamander Hotels and Resorts, President of WNBA's Washington Mystics & Co-Founder of BET

Walk Through Fire: A Memoir of Love, Loss, and Triumph

Lena Dunham

Writer, Director, Actor & Producer Best Known for HBO’s “Girls”

Michael Phelps

Retired Professional Swimmer; Most Decorated Olympic Athlete in History

Tom Brady

Former Quarterback for the New England Patriots & Tampa Bay Buccaneers; Seven Time Super Bowl Winner

Anna Kournikova

International Tennis Icon, Health & Fitness Advocate, Former World #1 Doubles Player and #8 Singles Player; Former Co-Host on NBC’s “The Biggest” Loser (2011), Named to the Forbes “Power 100” in 2000

Alfre Woodard

Emmy Award-Winning Actress; Human Rights Activist

Chrissy Teigen

Model, Author & Television Personality

John McEnroe

Retired World No. 1 Tennis Player in Singles & Doubles; International Tennis Hall of Famer & Author of "You Cannot Be Serious"

George Foreman

World Boxing Champion & Entrepreneur

Tyrese Gibson

R&B Singer, Actor & Author

Drew Carey

Actor, Voice Actor & Comedian; Sports Executive; Game Show Host

Ted Turner

Media Mogul & Philanthropist

Sarah Silverman

Stand-Up Comedian, Actress, Singer, Producer & Writer

Tonya Lewis Lee

Author, Producer, Filmmaker & Entrepreneur; Women's Health Activist

Tonya Lewis Lee on the Black maternal mortality crisis

Vanessa Minnillo Lachey

Actress, Television Personality & Author

Chloe Bennet

Actress & Singer Known for Her Role in "Agents of S.H.I.E.L.D."

Jason Segel

Writer & Actor Known for His Role in "How I Met Your Mother," "Forgetting Sarah Marshall" & "I Love You, Man"

Bob Greene

Exercise Guru & Best-Selling Author

Kunal Nayyar

Actor Known for "The Big Bang Theory"

Anika Noni Rose

Tony Award-Winning Actress & Singer; Voice of Princess Tiana

Lucy Liu

Actress, Model, Artist, Film Producer & Director

Danielle Brooks

TV, Film & Broadway Actress Known for "Orange is the New Black," "Peacemaker" & "The Color Purple"

Danielle Brooks On “The Piano Lesson” & Viral “The Color Purple” Callback

Eddie Huang

Writer, Chef, Entrepreneur, TV Personality & Author of "Fresh Off The Boat"

SuChin Pak

Veteran Media Personality & TV Host

Michelle Rodriguez

Actress Known for her Roles in "Avatar" and "The Fast and the Furious"

Steven Tyler

Aerosmith Lead Singer & Former 'American Idol' Judge