Al Duncan

Motivational Speaker for At-Risk Youth; Authority on Development & Empowerment

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Alexandra Robbins

Journalist & Bestselling Author; Her Books Include "Secrets of the Tomb: Skull and Bones, the Ivy League, and the Hidden Paths of Power"

Alice Waters

Executive Chef, Founder & Owner of Chez Panisse; Sustainable Agriculture Advocate

Alicia Silverstone

Actress & Animal Rights Activist

Alyssa Milano

Actress, Author, Philanthropist & Founder of Touch by Alyssa Milano; Known for "Charmed" and "Who's the Boss"

Amanda Lindhout

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

Ambassador Dennis Ross

Author, Counselor & William Davidson Distinguished Fellow at The Washington Institute; Former Special Assistant to President Obama

Amy Myers Jaffe

Leading Expert on Global Energy Policy & Sustainability

Amy Schumer

Award-Winning Actress & Comedian; Author of "The Girl with the Lower Back Tattoo;" Feminist Advocate

Amy Schumer diagnosed with rare health disorder: ‘Something was wrong’

Andrea Mitchell

Host of MSNBC’s "Andrea Mitchell Reports" & Chief Foreign Affairs Correspondent for NBC News

Andrea Mitchell - Celebrating 15 years of "Andrea Mitchell Reports"

Andrew Revkin

Senior Fellow for Environmental Understanding at Pace University

Andy Serwer

Managing Editor, Fortune Magazine

Ann Bancroft

Pioneering Polar Explorer; Educator & Dyslexia Advocate; Activist for Women & Girls

Ann Wright

Activist; Former United States Army Colonel; Retired U.S. State Department Official

Anne Wojcicki

Co-Founder & CEO of 23andMe

Antonio Villaraigosa

41st Mayor of Los Angeles

Arnold Schwarzenegger

Actor, Producer, Director, Writer; California’s 38th Governor; Host of "Celebrity Apprentice"

Art Smith

Celebrity Chef, Author & Humanitarian; Served as the Personal Chef of Oprah Winfrey

Ashley Rhodes-Courter

International Child Welfare Advocate, Master of Social Work, Foster Parent & Author of the Best-Selling Memoir "Three Little Words"