* ActorAllusion: [[Film/SweeneyToddTheDemonBarberOfFleetStreet Mrs. Lovett and Pirelli]] ([[OohMeAccentsSlipping whose accent is, of course, all over the place]]) have hidden compartments all over the place and are seen stuffing "this and that" into a giant meat grinder with a false leg. [[MammaMia Sophie]] has to deal with a loving but somewhat mysterious parent.
* AllStarCast: Creator/HughJackman (Valjean), Creator/RussellCrowe (Javert), Creator/AnneHathaway (Fantine), Creator/SachaBaronCohen (Thénardier), Creator/HelenaBonhamCarter (Mme. Thénardier), Eddie Redmayne (Marius), Creator/AmandaSeyfried (Cosette), Samantha Barks (Éponine), and Creator/AaronTveit (Enjolras). In addition, Colm Wilkinson plays the Bishop of Digne while Frances Ruffelle and many other former cast members have cameos.
* DyeingForYourArt: For the film Creator/AnneHathaway had her hair cut short on camera and lost 25 pounds to make it look like she was dying. HughJackman lost 30 pounds, shaved his head, and grew a scraggly beard for the scenes where Valjean was a convict, even going 36 hours without water. Talk about this to the extreme.
* EnforcedMethodActing: According to the DVD commentary, the entire barricade building sequence was done by the actors themselves in real time, which was around 15 minutes, and the director's only instructions were four words: "Build a barricade. Action!"
* FakeNationality: The French characters are played by Australian, American and British actors.
* HeyItsThatGuy: With an AllStarCast, [[http://zhaomeng.deviantart.com/art/Les-Mis-Wolverine-349538938 this is of course inevitable]]. Lampshaded during Hugh Jackman and Anne Hathaway's Les Mis segment during the 2013 SAG awards.
--> '''Anne Hathaway''': [[{{Film/X-Men}} Wolverine]] is being chased by {{Film/Glad|iator}}[[RussellCrowe iato]][[IAmNotShazam r...]]
--> '''Hugh Jackman''': [[Film/TheDarkKnightRises Catwoman]] gets knocked up, and for some ungodly reason goes to see [[Creator/HelenaBonhamCarter Bellatrix Lestrange]] from ''Film/HarryPotter'' and {{Film/Bora|t}}[[SachaBaronCohen t...]]
--> '''Anne Hathaway''': And then Wolverine agrees to raise Catwoman's baby...
--> '''Hugh Jackman''': And she [[Creator/AmandaSeyfried grows up to star in]] ''MammaMia''!
** Fantine was also [[Film/ThePrincessDiaries Princess Mia]], which kickstarted her popularity.
** [[Creator/AaronTveit Enjolras]] is [[NextToNormal alive, he's alive, he is soooo alive...]]. And he was Nate's cousin, [[GossipGirl Tripp van der Bilt]]. And now, ironically, he's [[Series/{{Graceland}} an undercover FBI Agent]].
** Creator/HelenaBonhamCarter pretty much plays Mme. Thénardier exactly the same as [[Film/SweeneyToddTheDemonBarberOfFleetStreet Mrs. Lovett]]. She and SachaBaronCohen basically rolled out of ''Sweeney Todd'' for this one.
** And [[Theatre/LesMiserables Jean Valjean]] has passed his silver candlesticks on to Wolverine[[note]][[DontExplainTheJoke To elaborate, it's Colm Wilkinson, the original Valjean of the Broadway and West End productions]][[/note]]
** Marius is [[TessOfTheDUrbervilles Angel Clare]].
** Apparently [[Creator/AmandaSeyfried Cosette]] can [[Film/MeanGirls predict the weather with her boobs.]]
** And is [[Series/VeronicaMars Lilly Kane]] and [[Film/{{Lovelace}} a tragic porn star]].
** Eponine is [[Theatre/LesMiserables Eponine]]. [[note]]Samantha Barks played Eponine on stage back in 2010.[[/note]]
** The woman who tells the foreman about Fantine's child is [[Literature/HarryPotterAndTheDeathlyHallows Mary Elizabeth Cattermole]], [[Recap/SherlockS01E02TheBlindBanker Seb from the bank]] attacks her, and lastly [[Recap/DoctorWhoS33E4ThePowerOfThree Kahler-Jex]] pulls her teeth.
* RealLifeRelative: Russell Crowe's son, Tennyson, appeared in "Do You Hear The People Sing?" as one of the street urchins, waving the red flag, with Gavroche.
* SavedFromDevelopmentHell: A film adaptation of the musical was discussed for many years; the 1991 souvenir program for the stage show claimed it was coming out in 1993 via [=TriStar=] Pictures. Universal Pictures was the studio that finally brought the movie to the light of day in December 2012.
* WhatCouldHaveBeen:
** The original cut is 4 hours with a 15-minute long battle sequence. But Hooper trimmed it down to 2 hours and 37 minutes which results to some songs cut with some scenes from the trailers not appearing in the final version of the movie, such as the last part of "The Confrontation" where Valjean and Javert continues singing the last stanza of the song in a form of a DistantDuet.
** Before Samantha Barks reprised her role as Eponine for the film, LeaMichele, TaylorSwift and ScarlettJohansson (who also auditioned for the role of Fantine) were considered for the role
** Before Anne Hathaway was cast as Fantine, AmyAdams, MarionCotillard and KateWinslet were considered for the role.
* WordOfGod: In Master of the House, Madame Thénardier replaces an outgoing guest's luggage with a basket containing a baby. It is confirmed that the baby is [[spoiler: Gavroche]].