Adrian Grenier

Actor Known for HBO's "Entourage"; Environmental Activist; UN Ambassador

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Danni Washington

TV Host, Science Communicator, Ocean Explorer & Nature Advocate

Danny Trejo

Actor, Author, Activist & Restaurateur; Recovery & Intervention Counselor for Troubled Youth

Dr. Michio Kaku

World-Renowned Futurist & Theoretical Physicist

Dr. Sylvia Hood Washington

Chief Environmental Research Scientist at Environmental Health Research Associates, LLC.

Ellen DeGeneres

Award-Winning Comedian, TV Host, Actress & LGBTQ Activist

Erin Brockovich

Consumer Advocate, Author, TV Host & Environmental Activist

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Martin Sheen

Award-Winning Actor Known for "The West Wing" & "Grace and Frankie;" Social Activist & Humanitarian

Pierce Brosnan

Actor, Producer & Activist; Best Known for His Role as James Bond

Raymond Bonner

Pulitzer Prize-winning investigative reporter and foreign correspondent.

Sylvia Acevedo

Engineer, Rocket Scientist & Technology Leader; Inspirational Speaker; Corporate Director at Qualcomm; Former CEO of Girl Scouts USA

How Sylvia Acevedo Defied Barriers to Become Girl Scout CEO