Mika Brzezinski

Co-host of MSNBC's "Morning Joe" & Bestselling Author; Founder of "Know Your Value"

Venus Williams

Professional Tennis Player, Four-Time Olympic Gold Medalist, Equal Pay Activist, Author & Entrepreneur

Ian Somerhalder

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

William Shatner

Emmy-Award Winning Actor, Known for "Star Trek" & "Boston Legal"

Retta

Stand-Up Comedian & Actress Known for "Parks and Recreation"

Bill Nye

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

Spike Lee

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

Ashley Judd

Actress, Activist & Humanitarian

T.J. Miller

Actor and Stand-Up Comedian, Currently Starring in HBO's 'Silicon Valley'

Nick Offerman

Actor, Writer & Carpenter; Best Known for "Parks and Recreation"

Alan Alda

Actor; Writer; Science Advocate; Director

Rob Lowe

Actor, Best-Selling Author, Podcaster & Philanthropist

Andie MacDowell

Film Actress

Gary Sinise

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

Diane Guerrero

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

Monica Lewinsky

Producer, Social Activist, Contributing Editor to Vanity Fair, Expert on Cyberbullying, Women's Issues & Reinvention

Monica Lewinsky Suits Up for Reformation's New Power Voting Campaign

Janet Mock

Author, Feminist, Transgender Rights Activist, TV Host & Founder of #GirlsLikeUs

Sophia Bush

Actress, Humanitarian & Author

Will Packer

Award-Winning Producer Known for "Think Like A Man" & "Straight Outta Compton"; Founder of Will Packer Productions

Kal Penn

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