Will Smith

Agent J

Tommy Lee Jones

Agent K

Josh Brolin

Young Agent K

Jemaine Clement

Boris The Animal

Emma Thompson

Agent O

Michael Stuhlbarg

Griffin

Mike Colter

Colonel

Nicole Scherzinger

Boris's Girlfriend

Michael Chernus

Jeffrey Price

Alice Eve

Young Agent O

David Rasche

Agent X

Keone Young

Mr. Wu

Bill Hader

Andy Warhol

Cayen Martin

Colonel's Son

Clarke Thorell

Prison Guard #1

Adam Mucci

Prison Guard #2

Tom McComas

Prison Guard #3

Douglas Crosby

Prison Guard #4

Woodie King Jr.

2012 MIB HQ Guard

Jack A. O'Connell

1969 MIB HQ Guard

Tobias Segal

1969 MIB Agent #1

Jon Shaver

1969 MIB Agent #2

Gerritt Vandermeer

1969 MIB Agent #3

Alexandra O'Hara

Mom

Violet O'Hara

Little Chocolate Milk Girl

Valence Thomas

Coney Island Hippie

Chloe Sonnenfeld

Coney Island Flower Child

Lanny Flaherty

Obadiah Price

Jonathan O'Hara

MIB Desk Agent

Rick Baker

Brain Alien

Joseph D'Onofrio

New York Mets Fan #1

Joseph R. Gannascoli

New York Mets Fan #2

Katy Frame

Diner Waitress

Kevin Townley

Funky 60's Dude

Stephen Brian Jones

Guru

Tyler Johnson

Muscle Boy at Happening

Kati Rediger

Muscle Boy's Girlfriend at Happening

Victor Joel Ortiz

Air Force MP #1

Charlie Barnett

Air Force MP #2

Ian Blackman

Car Theft Victim

Jeremy Beiler

Hotel Doorman

Liliane Klein

Screaming Lady on Ferris Wheel

Britt Chandler Johnson

Detained Teenage Alien

Jared Johnston

Neil Armstrong

Ken Arnold

Buzz Aldrin

Jonathan Drew

Michael Collins

Joel Brady

1969 Man in Elevator

David Pittu

Roman The Fabulist

Lenny Venito

Bowling Ball Head

Anthony J. Gallo

Four-Armed Alien

James Martin Kelly

1969 NYPD Cop #1

Will McLaughlin

1969 NYPD Cop #2

Kimmy Suzuki

Mr. Wu's Bartender

Kirk Larsen

Dead Zed

Rebecca Glasscock

Transvestite at Happening

Barry Sonnenfeld

Husband Watching Launch

Susan Ringo

Wife Watching Launch

Stephanie Ellis

Young Wife #1 Watching Launch

Ben Mac Brown

Young Husband #1 Watching Launch

Amy Erwitt

Young Wife #2 Watching Launch

Brad Abrell

Worm (voice)

Tim Blaney

Worm (voice)

Thom Fountain

Worm (voice)

Carl J. Johnson

Worm (voice)

Will Arnett

Agent AA (uncredited)

Jada Pinkett Smith

Party Guest (uncredited)

Tony Shalhoub

1969 Newsstand Vendor (uncredited)

Alex Ziwak

Prisoner (uncredited)

Jason Liles

Feelers / Colussus (uncredited)

Jesse Ridgway

Pedestrian (uncredited)

Justin Bieber

Alien on TV Monitors (uncredited)

Erin Lindsey Krom

Headquarters Secretary (uncredited)

Tim Burton

Alien on TV Monitors (uncredited)

Eha Urbsalu

1969 MIB Secretary #1 (uncredited)

Rip Torn

Large-Headed Alien at Funeral (uncredited)

Howard Stern

1969 Man in MIB HQ (uncredited)

Alpheus Merchant

MIB Guard (uncredited)

Leonard Zimmerman

Warhol Benefactor (uncredited)

Liz Logan

Coney Island Sunbather (uncredited)