* ActingForTwo: In the movie, the AllStarCast plays one role in almost every timeline, in a type of invocation of NarrowedItDownToTheGuyIRecognize. It would probably be easier to list who ''doesn't'' play multiple roles. Some of the lesser recognized dual roles are Brody Nicholas Lee as both Javier Gomez, Luisa Rey's neighbor, and Zachry's nephew in the 2321 storyline, and Robert Fyfe as a crewmember on the ship in Adam Ewing's story and Mr. Meeks.
* ActorAllusion: Creator/HugoWeaving [[TheAdventuresOfPriscillaQueenOfTheDesert in drag]].
* DoingItForTheArt: This is one of the most expensive Independent Movies ever made. Of course it would count as this.
* FakeNationality: Too many to count. Just to list a few, Chinese Zhou Xun plays a Korean waitress, Australian Hugo Weaving plays a German composer, American Tom Hanks plays a Cockney gangster and so on and so forth.
* HeyItsThatGuy: This comes with having an AllStarCast. In this case, it's unique in that "That Guy/Girl" probably [[ActingForTwo plays more than one character]] in the film.
* HeyItsThatVoice: The Japanese dub is a good as the original English version in the AllStarCast department. For the sake of simplicity, only the actors who played their group of characters will be listed here:
** Creator/TomHanks: Creator/KazuhikoInoue
** Creator/HalleBerry: Creator/TakakoHonda
** Creator/JimBroadbent: HiroyaIshimaru
** Creator/BaeDoona: Creator/MikakoTakahashi
** James D'Arcy: Creator/KentaroIto
** Creator/DavidGyasi: HirokiTakahashi
** Creator/BenWhishaw: Creator/TomokazuSeki (Brutally PlayingAgainstType, if we take into account he's also voicing ''[[CrossDressingVoices Georgette]]'')
* MeanCharacterNiceActor: Hanks and Grant, for sure, but even Broadbent gets in touch with his inner bastard in a couple of his roles.
* PlayingAgainstType: You could make arguments for a lot of parts actors play in the movie. Seeing Tom Hanks playing characters as sleazy, or downright villainous, as [[{{Slimeball}} the Hotel Manager]], [[DeadlyDoctor Dr. Henry Goose]] and [[AxCrazy Dermot Hoggins]] is a delightful surprise. Hugh Grant plays both a CorruptCorporateExecutive and a ''[[ImAHumanitarian cannibal tribesman]]''.
* WhatCouldHaveBeen: Quite a few things, both book and movie, according to this [[http://www.slashfilm.com/15-things-cloud-atlas/ piece]] by Slashfilm.
** The book was supposed to have 9 stories, starting all the way back in the 12 century.
** Dr. Ovid was supposed to be played by Tom Hanks.
** Ben Whishaw was supposed to appear as a business man in Sonmi's story.
** James D'Arcy had a bigger role in Cavendish's tale before it got cut down.
** Creator/NataliePortman, JamesMcAvoy and Creator/IanMcKellen were once involved in the project at one point.