* AdvertisedExtra: Olivia Wilde only has twenty minutes of screen time.
* DawsonCasting: An odd example since most important characters even though they ''look'' young are often quite old. Cillian Murphy in particular is in his mid 30's playing a character a decade younger (biologically speaking). And Music/JustinTimberlake is in his 30s. Of the entire main cast, only Creator/AmandaSeyfried was really 25.
* FakeAmerican: Irish actor Cillian Murphy does an American accent. Averted with the British Alex Pettyfer - who usually played these at this time - as he keeps his English accent.
* PlayingGertrude: An extreme example as Justin Timberlake is actually two years older than Olivia Wilde, who plays his mother. Justified as the film is set in a world where no one ages anymore.
* ProductionPosse: Justin Timberlake, Amanda Seyfried, Vincent Kartheiser and Olivia Wilde had all starred in ''Film/AlphaDog''.
* WorkingTitle: It originally was going to be titled "i'm.Mortal." It was also listed as "Now" on IMDB for a while.