Filmography46 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2025 | 9-1-1: NashvilleSeries | Captain Don Hart | 55 |
| 2024 | Hot Ones VersusSeries | Self | 54 |
| 2024 | NCISverse: The First 1,000Movie | Self | 54 |
| 2023 | BupkisSeries | Pete's Agent (uncredited) | 53 |
| 2021 | NCIS: HawaiʻiSeries | G. Callen | 51 |
| 2015 | The Late Show with Stephen ColbertSeries | Self | 45 |
| 2010 | Hawaii Five-0Series | G. Callen | 40 |
| 2010 | A Little HelpMovie | Bob | 40 |
| 2010 | Who Do You Think You Are?Series | Self | 40 |
| 2010 | Cats & Dogs: The Revenge of Kitty GaloreMovie | Shane | 40 |
| 2010 | ConanSeries | Self | 40 |
| 2009 | NCIS: Los AngelesSeries | G. Callen | 39 |
| 2009 | Watch What Happens Live with Andy CohenSeries | Self - Guest | 39 |
| 2008 | Max PayneMovie | Jason Colvin | 38 |
| 2007 | The CompanySeries | Jack McAuliffe | 37 |
| 2005 | Grey's AnatomySeries | Finn Dandridge | 35 |
| 2005 | American Dad!Series | G. Callen (voice) | 35 |
| 2005 | Head CasesSeries | Jason Payne | 35 |
| 2004 | KinseyMovie | Wardell Pomeroy | 34 |
| 2003 | Two and a Half MenSeries | Bill | 33 |
| 2003 | NCISSeries | G. Callen | 33 |
| 2003 | Jimmy Kimmel Live!Series | Self - Guest | 33 |
| 2003 | The Ellen DeGeneres ShowSeries | Self | 33 |
| 2002 | 29 PalmsMovie | The Hitman | 32 |
| 2001 | Once Upon a Time: The Super HeroesMovie | Robin (archive footage) | 31 |
| 2000 | Vertical LimitMovie | Peter Garrett | 30 |
| 1999 | The Early ShowSeries | Self | 29 |
| 1999 | The BachelorMovie | Jimmie | 29 |
| 1999 | RoveSeries | Self | 29 |
| 1997 | The PracticeSeries | Brad Stanfield | 27 |
| 1997 | The ViewSeries | Self | 27 |
| 1997 | Batman & RobinMovie | Dick Grayson / Robin | 27 |
| 1996 | In Love and WarMovie | Ernest 'Ernie' Hemingway | 26 |
| 1995 | Batman ForeverMovie | Dick Grayson / Robin | 25 |
| 1995 | Circle of FriendsMovie | Jack Foley | 25 |
| 1995 | Riddle Me This: Why Is Batman Forever?Movie | Self - Host / Robin | 25 |
| 1994 | Blue SkyMovie | Glenn Johnson | 24 |
| 1993 | The Three MusketeersMovie | D'Artagnan | 23 |
| 1993 | Late Night with Conan O'BrienSeries | Self - Guest | 23 |
| 1992 | School TiesMovie | Chris Reece | 22 |
| 1992 | Scent of a WomanMovie | Charlie Simms | 22 |
| 1991 | Fried Green TomatoesMovie | Buddy Threadgoode | 21 |
| 1990 | Men Don't LeaveMovie | Chris Macauley | 20 |
| 1988 | LIVE with Kelly and MarkSeries | Self - Guest | 18 |
| 1975 | People's Choice AwardsSeries | Self - Presenter | 5 |
| 1953 | The OscarsSeries | Self | — |