Millie Bobby Brown as Madison Russell

Kyle Chandler as Mark Russell

Mike Tyree Henry as Bernie Hayes

Tom Hardy as John Conrad

Kiera Knightly as Maria Conrad

Sally Hawkins as Vivienne Graham

Aisha Hinds as Colonel Foster

O'Shea Jackson Jr as Jackson Barnes

Zhang Ziyi as Ilene/Ling Chen

Bradley Whitford as Rick Stanton

ACEZ133 as Alex Hopper

Finn Wolffard as Michael Bishop

Caleb McLaughlin as Luke Fredericks

Gaten Materazzo as Billy Rogers

Noah Schnapp as Jack Williams

Sadie Sink as Tracy Phillips

Alec Baldwin as Clark Nelson

Eiza Gonzales as Maia Simmons

Demian Bichir as Walter Simmons

Shun Oguri as Ren Serizawa

Kaylee Hottle as Jia

Godzilla as himself

Kong as himself

Mechagodzilla as himself

Spitka as himself

Phoenix as herself