| Robin Williams | Andrew Martin |
| Sam Neill | Sir Richard Martin |
| Embeth Davidtz | Little Miss Amanda Martin/Portia Charney |
| Oliver Platt | Rupert Burns |
| Wendy Crewson | ``Ma´am'' Martin |
| Hallie Kate Eisenberg | 7-Year-Old Amanda Martin |
| Stephen Root | Dennis Mansky |
| Lynne Thigpen | President Marjorie Bota |
| Bradley Whitford | Lloyd Charney |
| Kiersten Warren | Galatea |
| John Michael Higgins | Bill Feingold |
| George D. Wallace | Male President |
| Joe Bellan | Robot Delivery Man |
| Brett Wagner | Robot Delivery Man |
| Angela Landis | Grace Martin |
| Scott Waugh | Motorcycle Punk |
| Quinn Smith | Frank Charney |
| Kristy Connelly | Monica |
| Jay Johnston | Charles |
| Igor Hiller | 10-Year-Old Lloyd Charney |
| Lindze Letherman | 9-Year-Old Grace Martin |
| Ples Griffin | Zimbabwe Representative |
| Marcia Pizzo | Lloyd's Wife |
| Paula Dupré Pesmen | Feingold's Assistant |
| Clarke Devereux | Priest |
| Bruce Kenneth Wagner | Engagement Party Guest |
| Paula West | Singer |
| Kevin ``Tiny'' Ancell | Restoration Worker |
| Richard Cross | Restoration Worker |
| Adam Bryant | Humanoid Head |
With the help of the family he works for, a robot goes on a 200-year quest to become human.
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