Dan Pallotta

Founder & President of Advertising for Humanity and the Charity Defense Council; Author of "Uncharitable" and "Charity Case"

Dwayne "The Rock" Johnson

Actor, Former WWE Wrestler & New York Times Best-Selling Author of "The Rock Says..."

Serena Williams

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

Serena Williams says she intends to retire from tennis after the U.S. Open

LeBron James

Sports Icon, NBA Superstar, Philanthropist

Abigail Disney

Disney Heiress; Executive Film Producer; Anti-Gun & Peace Activist; Founder of Peace is Loud

Stacy Pearsall

Photographer & Educator

Sangu Delle

Entrepreneur, Author, Clean Water Activist, Soros Fellow & TEDGlobal Fellow

Carlos Slim

Business Magnate, Investor, & Philanthropist

Amanda Lindhout

Executive Director of The Global Enrichment Foundation; Captivity Survivor, Inspirational Speaker & Author of "A House in the Sky"

Regina Spektor

American Singer-Songwriter and Pianist

Jessica Shortall

Social Entrepreneur & Author of "Work. Pump. Repeat. - The New Mom's Survival Guide"

David Foster

Producer, Songwriter & Chairman, Verve Music Group

Hal Harvey

CEO, Energy Innovation: Policy and Technology LLC

Designing Climate Solutions: A Policy Guide for Low-Carbon Energy

Jenny Santi

Philanthropy Advisor & Author, "The Giving Way to Happiness"

Jacquelline Fuller

Director of Google.org, Supporting Education, Development, Disaster Relief and Clean Energy Through Charitable Giving

Kim Azzarelli

Co-Founder, Seneca Women; Steering Committee Chair, Cornell Law School's Avon Global Center for Women and Justice

Daniel Shoy

President, East Lake Foundation

Josh Lozman

Deputy Director, Program Advocacy, Bill & Melinda Gates Foundation

David Blumenthal

President & CEO of The Commonwealth Fund; Health Information Technology Expert

Deborah Ellis

Award-Winning Author of International Best-Seller, "The Breadwinner", Feminist and Peace Activist