----
* AgeLift: Everyone is supposed to look like they're forever 25 - and only Creator/AmandaSeyfried was that age during filming.
* 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.
* HeyItsThatGuy:
** [[Series/WhiteCollar Neal Caffrey]] has found a way to stop aging and is now over 100 years old.
** And [[Film/{{Inception}} Robert Fischer]] is chasing [[TheSocialNetwork Sean Parker]].
** Music/JustinTimberlake, Creator/AmandaSeyfried, Vincent Kartheiser, and Creator/OliviaWilde were previously in ''Film/AlphaDog''.
** [[Series/MadMen Pete Campbell]] continues to be smarmy even in the future.
*** Pete Campbell? I thought that was just [[Series/{{Angel}} Connor]] all grown up.
*** Connor '''was''' all grown up on ''Angel'', after being just a baby for a few episodes.
** Hey it's [[Series/TheBigBangTheory Leonard Hofstadter]], except an alcoholic in the future...
** Justin Timberlake's Mom is [[Film/TronLegacy Quorra]]!
** Philippe's Wife/Sylvia's mom, Michelle, is [[Film/DarkShadows Victoria Winters]].
** So now [[Film/TheSocialNetwork Sean Parker and Cameron/Tyler Winklevoss]] are direct enemies...
** The clerk of the motel Will and Sylvia check into is [[Series/{{Smallville}} Plastique]] and [[Series/BlackSails Max]].
* 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.
* WorkingTitle: It originally was going to be titled "i'm.Mortal."
** Was also listed as "Now" on IMDB for a while.
----