Uma Thurman
Irene Cassini
Ethan Hawke
Vincent Freeman
Alan Arkin
Detective Hugo
Xander Berkeley
Dr. Lamar
Tony Shalhoub
"German"
Ernest Borgnine
Caesar
Jude Law
Jerome Eugene Morrow
William Lee Scott
Young Anton
Gore Vidal
Director Josef
Jayne Brook
Marie Freeman
Loren Dean
Adult Anton Freeman
Elias Koteas
Antonio Freeman
Dean Norris
Cop on the Beat
Mason Gamble
Younger Vincent
Maya Rudolph
Delivery Nurse
Blair Underwood
Geneticist
Susan Jennifer Sullivan
Sequencing Customer
Ken Marino
Sequencing Technician
Greg Sestero
Gattacan Citizen (uncredited)
Cynthia Martells
Cavendish
Una Damon
Head Nurse
Elizabeth Dennehy
Preschool Teacher
Lindsey Ginter
Mission Commander
Russell Milton
Gattaca Detective
Gabrielle Reece
Gattaca Trainer