Shiza Shahid

Entrepreneur, Technologist, Investor, Impact Leader & Co-Founder of the Malala Fund and Our Place

Peter Diamandis

Founder & Executive Chairman of the XPRIZE Foundation; Author; Named One of The World's 50 Greatest Leaders

Van Jones

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

America Ferrera

Award-Winning Actress, Producer & Humanitarian

Yael Cohen Braun

Co-Founder & Board Chair of F*ck Cancer

Irshad Manji

Founder of The Moral Courage Project, Author of "Allah, Liberty and Love" & "The Trouble with Islam Today: A Muslim's Call for Reform in Her Faith"

Lisa Ling

Award-Winning Journalist & Producer for CBS News

Erin Gruwell

Founder & Executive Director of the Freedom Writers Foundation; Education Reform Advocate

Antwone Fisher

Child Advocate, Bestselling Author, Screenwriter & Lecturer

Chris Sacca

Google & Twitter Innovation Guru

Bill Nye

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

Pearl Arredondo

Student Advocate, Education Reformer & Principal

Ben Stein

Political Economist, Commentator, Author & Actor

Marilyn Tam

Leadership Speaker, Bestselling Author, Consultant & Board Certified Corporate Coach; CEO of Marilyn Tam & Co.; Founder and Executive Director of Us Foundation

Speaking Reel - Marilyn Tam - YouTube

David Agus

Co-Founder of Navigenics, Author of "The End of Illness" & Host of "The Checkup with Dr. David Agus"; Professor of Medicine & Engineering at the University of Southern California

The Book of Animal Secrets

Sophia Bush

Actress, Humanitarian & Author

Mayim Bialik

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

George Takei

Actor, Social Justice Activist & Social Media Mega-Power

Geena Davis

Award-Winning Actress, Gender Equality Activist & Philanthropist

LeVar Burton

Literacy Advocate & Actor Known for "Roots," "Star Trek" & "Reading Rainbow"