Johnny Knoxville
Scrad / Charlie
Rosario Dawson
Laura Vasquez
Patrick Warburton
Agent Tee
Colombe Jacobsen-Derstine
Hailey
Michael Rivkin
Man with Dog
Michael Bailey Smith
Creepy
Howard Spiegel
New York Guy
Alpheus Merchant
MIB Guard
Joel McKinnon Miller
Agent
Derek Cecil
Repairman Agent
Peter Spruyt
MIB Customs Agent
Kevin Cotteleer
MIB Customs Agent
Marty Belafsky
MIB Customs Agent
Rick Baker
MIB Passport Control Agent
Martha Stewart
Martha Stewart
Nick Cannon
MIB Autopsy Agent
Andre Blair
Central Park Agent
Jeremy Howard
Bird Guy Alien / Postal Sorting Alien
Mary Stein
Bird Lady Alien
Martin Klebba
Family Child Alien
John Alexander
Jarra / Family Dad Alien
Denise Cheshire
Family Mom / Locker Alien
Ernie Grunwald
Young Postal Employee
Chloe Sonnenfeld
Young Girl at Post Office
John Andrew Berton Jr.
Split Alien Guy
William E. Jackson
Eye Guy
Linda Kim
Ambassador Lauranna
Paige Brooks
"Mysteries in History" Lauranna
Stephanie Kemp
Neuralyzed Mother
Barry Sonnenfeld
Neuralyzed Father
Victoria Jones
Neuralyzed Daughter
Michael Dahlen
Flesh Balls
Tim Blaney
Frank the Pug (voice)
Greg Ballora
Sleeble (voice)
Carl J. Johnson
Gleeble (voice)
Thom Fountain
Neeble (voice)
Brad Abrell
Mannix (voice)
Richard Pearson
Gordy (voice)
Rick Avery
Subway Passenger (uncredited)
John D. Bair
Alien Attack Victim (uncredited)
Michael Beardsley
Suspicious Video Store Patron (uncredited)
Michael Buonomo
College Student (uncredited)
Kristin Charney
Family Mom (uncredited)
Patrick Coleman Duncan
'History's Mysteries' Alien (uncredited)
Darrell Foster
MIB Autopsy Agent (uncredited)
Ned Gorman
Cockroach on Sidewalk (voice) (uncredited)
Gene LeBell
Subway Passenger (uncredited)
Pete Macnamara
Man in Black (uncredited)
Drew Massey
Worm Guy (uncredited)
Matthew McGrory
Tall Alien (uncredited)
Christopher Metas
Alien Accountant (uncredited)
Bart Mixon
Alien Puppeteer (uncredited)
Alexandra O'Hara
Diner Waitress (uncredited)
David Patykewich
Bald Kid Alien (uncredited)
Martin Pfefferkorn
Homeless Alien Collaborater (uncredited)
David C. Roehm Sr.
Alien (uncredited)
Leo Rogstad
New Yorker on His Cell (uncredited)
Thomas Rosales Jr.
Subway Passenger (uncredited)
Brandee Sanders
Subway Business Woman (uncredited)
Hannah Sim
Head-Bobbing Alien (uncredited)
Peter Siragusa
Mayor of Grand Central Terminal Locker Aliens (voice) (uncredited)
Daniel Browning Smith
Aquarium Boy (uncredited)
Brian Steele
Sharkmouth (uncredited)
Mark Steger
Quadraped Alien (uncredited)
Alan Tuskes
Lobsterhead Alien (uncredited)
Shannon Watson
70's MIB Agent (uncredited)
Bo Welch
Astronaut (uncredited)