Adam Goldberg

Actor, Director, Producer & Musician

Mark Feuerstein

Actor, Star of "Royal Pains"

Tracee Ellis Ross

Actress, Producer; Chief Executive Officer at PATTERN

Harry Connick Jr.

Grammy & Emmy Award-Winning Singer

Sarah Michelle Gellar

Television & Film Actress, Co-Founder of Foodstirs

Noah Wyle

American Film, Television and Theater Actor; Known for his Role as 'Dr. John Carter' in "ER"

Michael Vartan

Michael Vartan (born November 27, 1968) is a French-American film and television actor.

Oliver Stone

Oscar-Winning Director

Ben Stiller

Actor & Comedian

Jon Stewart

Talk Show Host, Comedian & Producer

Jon Stewart will return to ‘The Daily Show’ as host — just on Mondays

Howard Stern

Radio & Television Personality, Producer, Author & Actor

Daniel Stern

Actor & Social Activist

Ben Stein

Political Economist, Commentator, Author & Actor

Pauly Shore

Stand-up Comedian and Actor

Harry Shearer

Actor and Comedian; Known for "The Simpsons" and "Spinal Tap"

Jerry Seinfeld

Comedian, Actor, Writer, & Television/Film Producer

Jason Segel

Writer & Actor Known for His Role in "How I Met Your Mother," "Forgetting Sarah Marshall" & "I Love You, Man"

Jeffrey Ross

Comedian, Author, "I Only Roast the Ones I Love" and Host, The Burn

Paul Reiser

Actor, Writer & Stand-Up Comedian Known for Portraying Paul Buchman in "Mad About You"

Natalie Portman

Award-Winning Actress Known for "Black Swan," "V for Vendetta" & Playing Padmé Amidala in the Star Wars Prequel Trilogy

Natalie Portman on self-confidence and performing from an early ...

Sean Penn

Academy Award-Winning Actor & Film Director; Political & Humanitarian Activist; Founder of Haiti Relief Organization

Mandy Patinkin

Actor Best Known for "Homeland," "Criminal Minds" and "The Princess Bride"

Gwyneth Paltrow

Actress, Entrepreneur, Founder & CEO of Goop

Rob Morrow

Credits as an actor also include Quiz Show (1994), Mother (1996/II), Last Dance (1996), The Day Lincoln Was Shot (1998) (TV),

Debra Messing

Emmy Award-Winning Actress & Global Ambassador for PSI/Youth AIDS

Barry Manilow

Singer-Songwriter Known for "Mandy" and "Can't Smile Without You"

David Mamet

Pulitzer Prize-Winning Playwright

Bill Maher

Political Satirist & Host of HBO's "Real Time"

Hal Linden

Actor, Director & Musician

Robert Klein

Comedian and Actor Known for his Wry Wit and Unique Brand of Humor