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

Tim Blaney

Frank the Pug (voice)

Spencer Wilding

Luca Brasi

Marcy Harriell

Molly's Mom

Inny Clemons

Molly's Dad

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

Jeff Kim

Lead MIB Agent

Michael Adams

MIB Lead Interrogator

Andrew Greenough

Freddie the Alien

Natasha Culzac

Nightclub Waitress

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' Thivaios

Undercover Alien (uncredited)

Mike Lewis

Luke Johnson

Dancer (uncredited)

Rene Costa

Human Alien (uncredited)

Tiago Martins

Clubkid (uncredited)