* ActingForTwo: Dan Grimaldi played [[AlwaysIdenticalTwins twin brothers]] Philly and Patsy Parisi.
* ActorAllusion:
** In one episode, Paulie says, "I lived through TheSeventies by the skin of my nuts when the Colombos were goin' at it." Tony Sirico, the actor who plays Paulie, actually was an associate of the Colombo crime family before turning to acting.
** There are several references to Music/BruceSpringsteen in the show (Chris: "The turnpike is jammed with broken heroes on a last-chance power drive."), whom Steven van Zandt has played with for years. But it's difficult to tell if it's a deliberate Allusion because, hey, it's Jersey.
** Gloria Trillo really loves a song played on the radio, [[http://www.youtube.com/watch?v=qk2g9FEtr4k Steve Van Zandt's Affection]].
** A recursive one. The lead in Christopher's movie ''Cleaver'' is named Michael. The character is based on Chris himself, who is played by Michael Imperioli. In-universe it is probably a ShoutOut to Michael Corleone from ''Film/TheGodfather''.
** Chris shoots a bakery worker in the foot for taking too long with his order. In ''Film/{{Goodfellas}}'', he was shot in the foot for taking too long making a drink.
** The murder of [[spoiler: Angelo Garepe]] referred back to the death of Billy Batts in ''Film/{{Goodfellas}}''; both were beaten, thrown into a car trunk, and shot while pleading for their life. Batts was played by actor Frank Vincent (Phil Leotardo) who reverses his role from victim to executioner.
** Michael Imperioli [[WrittenByCastMember wrote five episodes]] of The Sopranos and was the only actor to write multiple episodes. This would probably explain Christopher's interest in screenwriting and production.
* ActorSharedBackground: Tony Sirico really did have mob connections at one time. This is [[ActorAllusion referenced in the show]] when he mentions his association with the Gambinos during the 70s.
* [[AuthorExistenceFailure Actor Existence Failure]]: Nancy Marchand, who played Livia, passed away during Season Three.
* {{The Character Died with H|im}}er: Livia Soprano, played by Nancy Marchand.
* TheDanza: JT Dolan, played by Tim Daly. Doesn't seem like it at first, but when [[FridgeLogic you realise]] that Daly's full name is James Timothy Daly or JT Daly...
* EnforcedMethodActing: Ralphie's crew look genuinely surprised - Ralph's hair almost takes off - when [[http://www.youtube.com/watch?v=T1cfyDMR_L0 Vito breaks a chair and falls like an elephant]]. In fact the whole moment looks like a borderline ThrowItIn, comically incorporated later into the script.
* FakeNationality: Furio, who has lived his entire life in Italy, is played by Italian-born New Jersey raised Federico Castelluco.
* FlipFlopOfGod: Creator David Chase didn't help the "Did Tony die in the finale" debate by first stating there was no hidden meaning, then saying ''"anyone who wants to watch it, it's all there"'', and then later commenting ''"there's more than one way of looking at the ending."'' In other words: '''Tony's dead unless he isn't.'''
* HeyItsThatVoice: Some foreign-dubbed versions were [[TheOtherDarrin dubbed more than once:]]
** '''Japanese''':
** Tony Soprano [[MasaruIkeda is]] [[SakuraWars Ikki Yoneda]] in the first dubbed version
** [[Creator/SayakaOhara Meadow is]] [[UminekoNoNakuKoroNi Beatrice]], [[Anime/QueensBlade Melpha]] and [[KaleidoStar Layla Hamilton]] in the first dubbed version. In the second dubbed version, [[SachikoKojima she is]] [[VideoGame/SuperRobotWarsZ Marguerite Pistail]]
** [[Creator/AkiraIshida Tony Jr. is]] [[Anime/NeonGenesisEvangelion Kaworu Nagisa]] and [[MobileSuitGundamSEED Athrun Zala]] in the first dubbed version.
** [[TaitenKusunoki Silvio Dante is]] [[Manga/{{Naruto}} Ibiki Morino]] in the first dubbed version
** [[Creator/KenjiNomura Big Pussy is]] [[VideoGame/BlazBlue Iron Tager]] and [[Manga/{{Bleach}} Yammy]] in the first dubbed version
** In the undubbed version, Carmela's cousin and financial advisor, Brian, went on to become [[VideoGame/MassEffect3 the shuttle pilot for the Normandy.]]
* RealLife/MeanCharacterNiceActor: Fellow actors usually remark that Jimmy Gandolfini was Tony Soprano's polar opposite, a great actor but an even better human being.
** David Proval played Richie Aprile, perhaps the worst of all the show's mobsters, but in interviews he comes off as incredibly laid back and friendly.
* TheOtherMarty: Fairuza Balk originally played the FBI Agent Deborah Ciccerone in "Army of One", and the initial broadcast kept her scenes. However, as she could not reprise the role for the character's later planned appearances (due to scheduling conflicts), her scenes were quickly reshot with a replacement actress, Lola Glaudini. The reruns of the episode and the DVD release use the replacement scenes to keep continuity with the character's later role.
* PromotedFanboy: Many prominent New Jerseyans receive cameos, often as themselves; these include Jon Bon Jovi, Lawrence Taylor (of the New York Giants), and Eric Mangini (of the New York Jets).
* RealitySubtext:
** Many actors in the show were arrested during the show's run. Their real crimes were not that serious though, certainly not on the level of their characters.
** Tony Sirico (Paulie Walnuts) was allegedly a member of the Colombo crime family in the 70's and was convicted of robbery and weapon possession.
** Lillo Brancato (Matthew Bevilacqua in the 2nd series) was charged with murdering a cop in 2005, and although he was acquitted of that, was still sentenced to ten years imprisonment on a related burglary charge.
** Tony Darrow (Larry Boy Barese) was an associate of the Gambino crime family and had been convicted of beating an extortion victim.
* ThrowItIn: Tony putting his hands on a turned on stove at Ralph's house was an actual accident and his reaction is genuine.
* TooSoon: After 9/11, the title sequence was re-edited to remove the shot of the Twin Towers from Tony's sideview mirror. Later averted as the new Mafia-[=FBI=] dynamic post 9/11 is explored in detail, as the Feds don't consider the Mafia their biggest threat, and the Mafia start to question their "No Snitching" policy when terrorists are involved.
* WhatCouldHaveBeen: Creator/RayLiotta, of ''Film/{{Goodfellas}}'' fame, was the first choice to play Tony Soprano.
* WrittenByCastMember: Michael Imperioli wrote several episodes of ''Series/TheSopranos''.

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