Actor
| 1. | Reunion (2011) as Brad | |
| 2. | The Talent Given Us (2006) as Billy / Himself | |
| 3. | Treasure of the Seven Mummies (2005) | |
| 4. | The Drone Virus (2004) as Stephen Roland | |
| 5. | Kismet (1999) as Matthew | |
| 6. | Relax... It's Just Sex (1998) as Jared Bartoziak | |
| 7. | Last Lives (1997) as Malakai | |
| 8. | Starlight (1996) as Kieran | |
| 9. | Boys on the Side (1995) as Nick | |
| 10. | Children of the Dust (1995) as Corby/White Wolf | |
| 11. | Venus Rising (1995) as Nick | |
| 12. | The Fence (1994) as Terry Griff | |
| 13. | Judicial Consent (1994) as Martin | |
| 14. | Body Snatchers (1993) as Tim Young | |
| 15. | Who Killed The Baby Jesus (1992) as Travis Adams | |
| 16. | The Lost Boys (1987) | |
| 17. | Seven Mummies () as Travis |
Miscellaneous Crew
| 1. | Dirty Hands (2006) Associate Producer |
Director
| 1. | MacArthur Park (2001) Director | |
| 2. | Kismet (1999) Director |
Producer
| 1. | MacArthur Park (2001) Producer |
Most Popular Films with Billy Wirth
| 1. | The Lost Boys | 1987 |
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| 2. | Boys on the Side | 1995 |
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| 3. | Relax... It's Just Sex | 1998 |
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| 4. | Last Lives | 1997 |
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| 5. | The Drone Virus | 2004 |
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| 6. | The Fence | 1994 |
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| 7. | MacArthur Park | 2001 |
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| 8. | The Talent Given Us | 2006 |
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| 9. | Seven Mummies |
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| 10. | Treasure of the Seven Mummies | 2005 |
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