Robert De Niro

as Master Chief Leslie W. Sunday ('Billy')

Cuba Gooding Jr.

as Senior Chief Carl Brashear

Charlize Theron

as Gwen Sunday

Aunjanue Ellis-Taylor

as Jo

Hal Holbrook

as 'Mr. Pappy'

Michael Rapaport

as GM1 Snowhill

Powers Boothe

as Captain Pullman

David Keith

as Captain Hartigan