Ming-Na Wen as Dr. Aki Ross (voice)

Alec Baldwin as Cap. Gray Edwards (voice)

Ving Rhames as Sgt. Ryan Whitaker (voice)

Steve Buscemi as Off. Neil Fleming (voice)

Peri Gilpin as Off. Jane Proudfoot (voice)

Donald Sutherland as Dr. Cid (voice)

James Woods as General Hein (voice)

Keith David as Council Member (voice)

Jean Simmons as Council Member (voice)

Matt McKenzie as Major Elliot (voice)

John DeMita as BCR Soldier #1 / Space Station Technician #2 / Additional Voices (voice)

Matt Adler as Additional Voices (voice)

Steve Alterman as Additional Voices (voice)

David Arnott as Additional Voices (voice)

Cathy Cavadini as Additional Voices (voice)

Lanei Chapman as Additional Voices (voice)

Vicki Davis as Additional Voices (voice)

Judi Durand as Additional Voices (voice)

Greg Finley as Additional Voices (voice)

Jack Fletcher as Additional Voices (voice)

Julia Fletcher as Additional Voices (voice)

Barbara Harris as Additional Voices (voice)

David McCharen as Additional Voices (voice)

Tracy Metro as Additional Voices (voice)

David Michie as Additional Voices (voice)

Richard Penn as Additional Voices (voice)

David J. Randolph as Additional Voices (voice)

Andrea Baker as Additional Voices (voice)

Eric Aten as Deep Eyes (uncredited)

John DiMaggio as BFW Soldier #1 (voice) (uncredited)

Alex Fernandez as Space Station Technician #3 (voice) (uncredited)

David Rasner as Space Station Technician #1 & 4 (voice) (uncredited)

Dwight Schultz as Scan Technician (voice) (uncredited)