Al Roker

Co-Host NBC Today Show Media Entrepreneur, Author

Alanis Morissette

Alt-Rock Angst Icon Known for "You Oughta Know" & "Ironic"

Alfonso Ribeiro

Host of America’s Funniest Home Videos, Actor, TV Director, Award-Winning Dancer & Broadway Star

Alfre Woodard

Emmy Award-Winning Actress; Human Rights Activist

Alicia Keys

Grammy Award-Winning Singer-Songwriter, Record Producer & Activist

Alison Sweeney

Actress & TV Personality Known for "Days of Our Lives" & "The Biggest Loser"

Alonzo Mourning

Naismith Memorial Basketball Hall of Fame Inductee; Co-Founder of Mourning Family Foundation

Amy Smart

Actress, Environmentalist & Co-Founder of Smart House Collections

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

Anna Paquin

Actress Best Known for "True Blood" and for the X-Men Franchise

Annie Lennox

Singer-Songwriter Known for "Sweet Dreams;" Political Activist & Humanitarian

Apolo Ohno

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

Hard Pivot: Embrace Change. Find Purpose. Show Up Fully.

Ben Affleck

Academy Award-Winning Producer, Writer, Director & Actor

Benedict Cumberbatch

English Actor Best Known for "Sherlock;" Ambassador for the Motor Neurone Disease Association

Benicio Del Toro

Puerto Rican-born Spanish Actor and Film Producer.

Bill Clinton

42nd President of the United States; Founder of the William J. Clinton Foundation

Bill Parcells

Former NFL Head Coach & Pro Football Hall of Fame Inductee

Bob Dylan

Legendary Singer-Songwriter and Entertainer; Known for "The Times They Are a-Changin'"

Bob Greene

Exercise Guru & Best-Selling Author

Bob Newhart

Stand-Up Comedian & Actor, Known for "The Bob Newhart Show" and "Newhart"