JG
Filmography
| 2019 | A Dog's Journey · as Henry Montgomery |
| 2018 | The Conners (TV Series) · as David Healy |
| 2017 | Rings · as Gabriel Brown |
| 2016 | The Cleanse · as Paul Berger |
| 2016 | For the Love of Spock · as Leonard Hofstadter |
| 2013 | |
| 2011 | In Time · as Borel |
| 2009 | Table for Three · as Ted |
| 2008 | Hancock · as Jeremy |
| 2007 | The Big Bang Theory (TV Series) · as Leonard Hofstadter |
| 2006 | My Boys (TV Series) · as Trouty |
| 2006 | Unaired Pilot · as Leonard Hofstadter |
| 2005 | My Name Is Earl (TV Series) · as Scott |
| 2005 | Happy Endings · as Miles (uncredited) |
| 2005 | American Dad! (TV Series) · as Arnie (voice) |
| 2005 | Peep Show · as Mark |
| 2004 | LAX (TV Series) · as Leland Pressman |
| 2004 | Chrystal · as Barry |
| 2003 | Hope & Faith (TV Series) · as Jay |
| 2003 | Bookies · as Jude |
| 2001 | Vanilla Sky · as Peter Brown |
| 2001 | Morgan's Ferry · as Darcy |
| 2000 | Bounce · as Seth |
| 2000 | Playing Mona Lisa · as Arthur |
| 1999 | The Norm Show (TV Series) · as Dale Stackhouse |
| 1999 | Family Guy (TV Series) · as Leonard Hofstadter (voice) |
| 1999 | Batman Beyond (TV Series) · as Knux (voice) |
| 1998 | The Opposite of Sex · as Jason Bock |
| 1997 | I Know What You Did Last Summer · as Max Neurick |
| 1997 | Suicide Kings · as Ira Reder |
| 1997 | Bean · as Stingo Wheelie |
| 1996 | Murder at My Door · as Teddy Mcnair |
| 1994 | Without Consent · as Marty |
| 1993 | A Family Torn Apart · as Daniel Hannigan |
| 1992 | Billy (TV Series) · as David Macgregor |
| 1991 | Civil Wars (TV Series) · as Greg Stolbach |
| 1991 | Backfield in Motion · as Tim Seavers |
| 1990 | In Defense of a Married Man · as Eric |
| 1990 | American Dreamer (TV Series) · as Danny Nash |
| 1990 | Blossom (TV Series) · as Jason |
| 1990 | Blind Faith (TV Series) · as John Marshall |
| 1989 | Christmas Vacation · as Russell 'rusty' Griswold |
| 1989 | Prancer · as Billy Quinn |
| 1989 | Hardball (1989) (TV Series) |
| 1988 | Roseanne (TV Series) · as David Healy |
| 1988 | A Night in the Life of Jimmy Reardon · as Toby Reardon |
| 1987 | Murder Ordained · as Doug Rule |