Sir Richard Branson

Businessman & Founder of Virgin Group

James Cameron

Filmmaker, Artist, Environmentalist

Jodie Foster

Actress, Film Director & Producer Known for "Silence of the Lambs"

Roger Federer

Professional Tennis Player & Record Holder for Most Grand Slam Titles Won; Ranked No. 1 in the World for a Total of Over 6 Years

Sam Harris

Neuroscientist, Philosopher & Bestselling Author

Keira Knightley

Academy Award-nominated English actress

Emma Thompson

Oscar-Winning Actress & Screenwriter; Known For "Brave" & "Nanny McPhee"

Daniel Radcliffe

Actor, Best Known for his Role as Harry Potter

Billy Joel

Globally-Recognized Pianist, Singer-Songwriter and Composer

Brian Eno

Musician, Record Producer, & Visual Artist

Ricky Gervais

Award-Winning English Comedian & Actor; Known for "The Office" and "Extras"

Paul Giamatti

Actor; Appeared in "Sideways" and "The Illusionist"

Paul Giamatti | Full Q&A | Oxford Union

Julianne Moore

Academy Award & Emmy Award-Winning Actress

Sir Ian McKellen

Actor & Activist

Hugh Laurie

Actor Best Known for His Role in the Medical Drama "House M.D."

Daniel Dennett

Professor of Philosophy at Tufts University

Lionel Hollins

Former Head Coach of the Brooklyn Nets & the Memphis Grizzlies; Youth Mentor

Ed Buckner

American Atheist Activist

Prem Kamble

Top Consultant in ERP and IT-Driven Change Management

Kory Puderbaugh

Paralympic Silver Medalist