Rebecca Hall as Ilene Andrews

Brian Tyree Henry as Bernie Hayes

Dan Stevens as Trapper

Kaylee Hottle as Jia

Alex Ferns as Mikael

Fala Chen as Iwi Queen

Rachel House as Hampton

Ron Smyck as Harris

Chantelle Jamieson as Jayne

Greg Hatton as Lewis

Kevin Copeland as Submarine Commander

Tess Dobre as Submarine Officer

Tim Carroll as Wilcox

Anthony Brandon Wong as Talk Show Anchor

Sophia Emberson-Bain as Laurier

Chika Ikogwe as Ms. Cadogan

Vincent B. Gorce as Monarch Specialist

Zhou Yeye as Iwi Warrior

Jamaliah Othman as Iwi Sage

Nick Lawler as Iwi Scholar

Jordy Campbell as Student (uncredited)

Cassie Riley as Beach Goer (uncredited)

Robert Clavero as Monarch Soldier / Technician (uncredited)

Patrick Moroney as Lecture Attendee (uncredited)