| 2024 | Remembering Gene WilderMovie | Self | 57 |
| 2021 | Annie Live!Movie | Oliver 'Daddy' Warbucks | 54 |
| 2019 | The Kelly Clarkson ShowSeries | Self | 52 |
| 2018 | Impractical Jokers: The Staten Island Holiday SpectacularMovie | Self | 51 |
| 2017 | Will & GraceSeries | Leo Markus | 50 |
| 2016 | The Giant's Dream: The Making of the Iron GiantMovie | Self | 49 |
| 2016 | Kevin Can WaitSeries | Harry Connick Jr. | 49 |
| 2016 | The Original Image of Divine MercyMovie | Self | 49 |
| 2014 | Late Night with Seth MeyersSeries | Self | 47 |
| 2014 | Dolphin Tale 2Movie | Dr. Clay Haskett | 47 |
| 2013 | Bayou Maharajah: The Tragic Genius of James BookerMovie | Self | 46 |
| 2012 | Finding Your RootsSeries | Self | 45 |
| 2009 | Watch What Happens Live with Andy CohenSeries | Self - Guest | 42 |
| 2009 | En direct de l'universSeries | Self | 42 |
| 2009 | Live from Studio FiveSeries | Self | 42 |
| 2009 | New in TownMovie | Ted Mitchell | 42 |
| 2009 | The ProjectSeries | — | 42 |
| 2008 | Living ProofMovie | Dr. Dennis Slamon | 41 |
| 2008 | Hope and Miracles: The Making of 'Living Proof'Movie | Self | 41 |
| 2008 | For Life: The Journey of Dr. Dennis SlamonMovie | Self | 41 |
| 2007 | P.S. I Love YouMovie | Daniel | 40 |
| 2007 | The Graham Norton ShowSeries | Self | 40 |
| 2007 | BugMovie | Jerry Goss | 40 |
| 2005 | The Late Late Show with Craig FergusonSeries | Self | 38 |
| 2005 | The Reichen ShowSeries | Self | 38 |
| 2005 | Shelter from the Storm: A Concert for the Gulf CoastMovie | Self | 38 |
| 2005 | Saturday Night Live in the '80s: Lost and FoundMovie | Self | 38 |
| 2005 | The Happy ElfMovie | Lil' Farley | 38 |
| 2004 | Strictly Come DancingSeries | Self | 37 |
| 2004 | MickeyMovie | Tripp Spence / Glen Ryan | 37 |
| 2003 | The Ellen DeGeneres ShowSeries | Self | 36 |
| 2003 | BasicMovie | Dr. Pete Vilmer | 36 |
| 2003 | The Marsalis Family: A Jazz CelebrationMovie | Self | 36 |
| 2003 | Australian IdolSeries | Self - Judge | 36 |
| 2002 | American IdolSeries | Self - Judge | 35 |
| 2002 | Life Without DickMovie | Daniel Gallagher | 35 |
| 2001 | Pistol Pete: The Life and Times of Pete MaravichMovie | Narrator | 34 |
| 2000 | My Dog SkipMovie | Narrator | 33 |
| 1999 | Law & Order: Special Victims UnitSeries | David Haden | 32 |
| 1999 | The Iron GiantMovie | Dean McCoppin (voice) | 32 |
| 1999 | The Making of 'The Iron Giant'Movie | Self | 32 |
| 1999 | The Worlds of Harry Connick Jr.Movie | Self | 32 |
| 1999 | Walt Disney World Very Merry Christmas ParadeMovie | Self | 32 |
| 1998 | Will & GraceSeries | Leo Markus | 31 |
| 1998 | Vivement dimancheSeries | Self | 31 |
| 1998 | ParkinsonSeries | Self | 31 |
| 1998 | Hope FloatsMovie | Justin Matisse | 31 |
| 1997 | The ViewSeries | Self | 30 |
| 1997 | Excess BaggageMovie | Greg | 30 |
| 1997 | Happy Birthday Elizabeth: A Celebration of LifeMovie | Self | 30 |
| 1996 | Independence DayMovie | Capt. Jimmy Wilder | 29 |
| 1996 | The Rosie O'Donnell ShowSeries | Self | 29 |
| 1995 | CopycatMovie | Daryll Lee Cullum | 28 |
| 1995 | Peter Allen: The Boy From OzMovie | Self | 28 |
| 1993 | Late Show with David LettermanSeries | Self - Musical Guest | 26 |
| 1993 | Disney's Night of MagicMovie | Self | 26 |
| 1992 | The Tonight Show with Jay LenoSeries | Self | 25 |
| 1991 | The Best of Disney: 50 Years of MagicMovie | Self | 24 |
| 1991 | Little Man TateMovie | Eddie | 24 |
| 1991 | Simply Mad About the MouseMovie | Self | 24 |
| 1990 | Memphis BelleMovie | Clay Busby | 23 |
| 1988 | LIVE with Kelly and MarkSeries | Self - Guest Co-Host | 21 |
| 1987 | Sacrée soiréeSeries | Self | 20 |
| 1987 | Le monde est à vousSeries | Self | 20 |
| 1982 | CheersSeries | Russell Boyd | 15 |
| 1982 | Late Night with David LettermanSeries | Self - Musical Guest | 15 |
| 1975 | Saturday Night LiveSeries | Self - Musical Guest | 8 |
