Chris Hemsworth
Henry / Agent H
Tessa Thompson
Molly Wright / Agent M
Rebecca Ferguson
Riza Stavros
Kumail Nanjiani
Pawny (voice)
Rafe Spall
Agent C
Laurent Bourgeois
Alien Twin #1
Larry Bourgeois
Alien Twin #2
Emma Thompson
Agent O
Liam Neeson
Agent High T
Mandeiya Flory
Young Molly
Kayvan Novak
Vungus / Nasr / Bassam
Annie Burkin
Nerlene
Tim Blaney
Frank the Pug (voice)
Spencer Wilding
Luca Brasi
Marcy Harriell
Molly's Mom
Inny Clemons
Molly's Dad
Thom Fountain
Worm Guy #1 (voice)
Drew Massey
Worm Guy #2 (voice)
Aaron Serotsky
Man in Black #1
Matthew Bates
FBI HR Guy
Sartaj Garewal
CIA Recruiter
Stephen Wight
Guy
Brian Silliman
Cabbie
John Sousa
Jimmy the Alien
Jeff Kim
Lead MIB Agent
Michael Adams
MIB Lead Interrogator
Andrew Greenough
Freddie the Alien
Natasha Culzac
Nightclub Waitress
David Hartley
MIB Forensics Agent
Paul Brennen
Alien Boss
Ania Sowinski
Alien Woman / Boss' Wife
Stefan Kalipha
Antique Shopkeeper
Daniel Scott-Smith
Nightclub Bartender
Vincent Pirillo
MIB Security Guard
Kaya Brown-Hallam
NIghtclub Patron #1
Beau Fowler
Nightclub Patron #2
Lukas DiSparrow
Nightclub Patron #3
Andy Beckwith
Viper Room Player
Romanos Blanco
Man at Eiffel Tower
Aistė Diržiūtė
Woman at Eiffel Tower
Anatole Taubman
French Salesman
Sorel Johnson
Nervous Forensic Tech
Paul Smith
Proprietor (Charlie)
Mike Capozzola
Veteran MIB Agent
J.J. Abrams
Alien on TV Monitor (uncredited)
Elle Black
Alien Dancer (uncredited)
Donald Glover
Alien on TV Monitor (uncredited)
Ariana Grande
Alien on TV Monitor (uncredited)
Elon Musk
Alien on TV Monitor (uncredited)
Hiten Patel
Tech Geek (uncredited)
Dimitri Vegas
Undercover Alien (uncredited)
Luke Johnson
Dancer (uncredited)