Chris Hemsworth ( Chris Hemsworth )

Henry / Agent H

Tessa Thompson ( Tessa Thompson )

Molly Wright / Agent M

Rebecca Ferguson ( Rebecca Ferguson )

Riza Stavros

Kumail Nanjiani ( Kumail Nanjiani )

Pawny (voice)

Rafe Spall ( Rafe Spall )

Agent C

Laurent Bourgeois ( Laurent Bourgeois )

Alien Twin #1

Larry Bourgeois ( Larry Bourgeois )

Alien Twin #2

Emma Thompson ( Emma Thompson )

Agent O

Liam Neeson ( Liam Neeson )

Agent High T

Mandeiya Flory ( Mandeiya Flory )

Young Molly

Kayvan Novak ( Kayvan Novak )

Vungus / Nasr / Bassam

Annie Burkin ( Annie Burkin )

Nerlene

Tim Blaney ( Tim Blaney )

Frank the Pug (voice)

Spencer Wilding ( Spencer Wilding )

Luca Brasi

Marcy Harriell ( Marcy Harriell )

Molly's Mom

Inny Clemons ( Inny Clemons )

Molly's Dad

Thom Fountain ( Thom Fountain )

Worm Guy #1 (voice)

Drew Massey ( Drew Massey )

Worm Guy #2 (voice)

Aaron Serotsky ( Aaron Serotsky )

Man in Black #1

Matthew Bates ( Matthew Bates )

FBI HR Guy

Sartaj Garewal ( Sartaj Garewal )

CIA Recruiter

Stephen Wight ( Stephen Wight )

Guy

Brian Silliman ( Brian Silliman )

Cabbie

John Sousa ( John Sousa )

Jimmy the Alien

Jeff Kim ( Jeff Kim )

Lead MIB Agent

Michael Adams ( Michael Adams )

MIB Lead Interrogator

Andrew Greenough ( Andrew Greenough )

Freddie the Alien

Natasha Culzac ( Natasha Culzac )

Nightclub Waitress

David Hartley ( David Hartley )

MIB Forensics Agent

Paul Brennen ( Paul Brennen )

Alien Boss

Ania Sowinski ( Ania Sowinski )

Alien Woman / Boss' Wife

Stefan Kalipha ( Stefan Kalipha )

Antique Shopkeeper

Daniel Scott-Smith ( Daniel Scott-Smith )

Nightclub Bartender

Vincent Pirillo ( Vincent Pirillo )

MIB Security Guard

Kaya Brown-Hallam ( Kaya Brown-Hallam )

NIghtclub Patron #1

Beau Fowler ( Beau Fowler )

Nightclub Patron #2

Lukas DiSparrow ( Lukas DiSparrow )

Nightclub Patron #3

Andy Beckwith ( Andy Beckwith )

Viper Room Player

Romanos Blanco ( Romanos Blanco )

Man at Eiffel Tower

Aistė Diržiūtė ( Aistė Diržiūtė )

Woman at Eiffel Tower

Anatole Taubman ( Anatole Taubman )

French Salesman

Sorel Johnson ( Sorel Johnson )

Nervous Forensic Tech

Paul Smith ( Paul Smith )

Proprietor (Charlie)

Mike Capozzola ( Mike Capozzola )

Veteran MIB Agent

J.J. Abrams ( J.J. Abrams )

Alien on TV Monitor (uncredited)

Elle Black ( Elle Black )

Alien Dancer (uncredited)

Donald Glover ( Donald Glover )

Alien on TV Monitor (uncredited)

Ariana Grande ( Ariana Grande )

Alien on TV Monitor (uncredited)

Elon Musk ( Elon Musk )

Alien on TV Monitor (uncredited)

Hiten Patel ( Hiten Patel )

Tech Geek (uncredited)

Dimitri 'Vegas' Thivaios ( Dimitri 'Vegas' Thivaios )

Undercover Alien (uncredited)

Mike Lewis ( Mike Lewis )

Luke Johnson ( Luke Johnson )

Dancer (uncredited)