Gregory Siff
- Compleanno:
- 12/21/1977
- Luogo di nascita:
- Brooklyn, New York, USA:
 | The Male Gaze: Celluloid Dreams (2021) Debate Boy |
 | River's End (2005) Doug Barton |
 | From Justin to Kelly (2003) Brandon |
 | Saturday Night Live: The Best of Will Ferrell (2002) Prom Date (archive footage) |
 | Boychick (2001) Debate Boy |
 | Unauthorized Brady Bunch: The Final Days (2000) Barry Williams |
 | In & Out (1997) Locker Room Guy |