| He played Throttlebottom in "Of Thee I Sing" | 54 |
| He played to the balcony | 24 |
| He played Tom Buchanan to Redford's Jay Gatsby | 50 |
| He played Tommy in "Tommy" | 36 |
| He played Tony on "NYPD Blue" | 39 |
| He played TV's Al Bundy | 27 |
| He played TV's Poncherello | 30 |
| He played Tynan in "The Seduction of Joe Tynan" | 57 |
| He played Ugarte in "Casablanca'' | 46 |
| He played Ugarte in "Casablanca" | 42 |
| He played Uncle Albert in "Mary Poppins" | 50 |
| He played Uncle Bill on "Family Affair" | 49 |
| He played Uncle Charley on "My Three Sons" | 52 |
| He played Uncle Jesse on "The Dukes of Hazzard" | 57 |
| He played Uncle Junior on "The Sopranos" | 50 |
| He played Van Doren in "Quiz Show" | 44 |
| He played Venus Flytrap | 23 |
| He played Virgil Earp in "Tombstone," 1993 | 52 |
| He played Vito in "The Godfather" | 43 |
| He played Warren Buffett on HBO's "Too Big to Fail" | 65 |
| He played Waverly on "The Man from U.N.C.L.E." | 56 |
| He played Wesley Crusher on "ST: TNG" | 47 |
| He played Wesley on "Star Trek: T.N.G." | 49 |
| He played Will Scarlet in "Robin Hood: Prince of Thieves" | 67 |
| He played Will's adversary in "MacGruber" | 55 |
| He played Winchester on "MASH" | 40 |
| He played WJM's Grant | 25 |
| He played Yemana on "Barney Miller" | 45 |
| He played Yogurt in "Spaceballs" | 42 |
| He played Yuri in "Doctor Zhivago" | 44 |
| He played Yuri to Julie's Lara | 34 |
| He played Zola, Pasteur et al. | 30 |
| He plays Andy Bernard on "The Office" | 47 |
| He plays Cooper on NBC's "Las Vegas" | 50 |
| He plays Dr. Carter on "ER" | 37 |
| He plays Dr. Eric Foreman on "House" | 46 |
| He plays Dr. Foreman on "House" | 41 |
| He plays Dr. Jack Shephard on "Lost" | 46 |
| He plays Dr. John Watson | 24 |
| He plays Fin on "Law & Order: SVU" | 48 |
| He plays Floyd R. Turbo | 23 |
| He plays hard for the money | 27 |
| He plays House | 14 |
| He plays Jack Donaghy on "30 Rock" | 44 |
| He plays Jack Malone on "Without a Trace" | 51 |
| He plays Jack on "24" | 31 |
| He plays Jack on "30 Rock" | 36 |
| He plays Klinger | 16 |
| He plays Lord Voldemort in Harry Potter films | 45 |
| He plays Lou Grant on TV | 24 |
| He plays Matt Houston's uncle | 33 |
| He plays Mr. Micelli on TV | 26 |
| He plays Niles' brother | 27 |
| He plays Odafin Tutuola on "Law & Order: SVU" | 59 |
| He plays Prince Rainier in the upcoming "Grace of Monaco" | 67 |
| He plays Sam in "Transformers" | 40 |
| He plays Sam on "Private Practice" | 44 |
| He plays the Devil in "The Devil's Advocate" | 58 |
| He plays the Priceline Negotiator | 33 |
| He plays Tom Haverford on "Parks and Recreation" | 58 |
| He plays Tom on "Parks and Recreation" | 48 |
| He plays wand store owner Mr. Ollivander in Harry Potter movies | 63 |
| He plays with an edge and with The Edge | 39 |
| He plays with the Edge | 22 |
| He pops the question | 20 |
| He portrayed a deputy who was allowed to carry only one bullet | 62 |
| He portrayed a Kennedy on TV | 28 |
| He portrayed Alfie | 18 |
| He portrayed Belasco: 1940 | 26 |
| He portrayed Big Daddy | 22 |
| He portrayed Chan after Oland | 29 |
| He portrayed Clyde | 18 |
| He portrayed Dagwood | 20 |
| He portrayed David Belasco | 26 |
| He portrayed Disraeli | 21 |
| He portrayed Fred with the junk | 31 |
| He portrayed Gomez Addams on TV | 31 |
| He portrayed James | 18 |
| He portrayed Jolson | 19 |
| He portrayed Lawrence | 21 |
| He portrayed Lawrence of Arabia | 31 |
| He portrayed Lou Grant | 22 |
| He portrayed Mr. Chips | 22 |
| He portrayed Obi-Wan | 20 |
| He portrayed Othello | 20 |
| He portrayed Pasteur | 20 |
| He portrayed Popeye Doyle | 25 |
| He portrayed Ray in "Ray" | 35 |
| He portrayed Sonny Corleone | 27 |
| He portrayed Tevye onstage | 26 |
| He portrayed the original Obi-Wan | 33 |
| He portrayed the police chief in "Casablanca" | 55 |
| He portrayed Zola | 17 |
| He pours beers for Homer, Carl and Lenny | 40 |
| He pours out whines | 19 |
| He practices girth control | 26 |
| He practices pettifoggery | 25 |
| He preceded and followed Conan | 30 |
| He preceded and followed O'Brien | 36 |
| He preceded Andy | 16 |