* IAmNotSpock: Averted with Keanu Reeves, played straight with Alex Winter.
* OldShame: For the longest time, Creator/KeanuReeves was worried his tombstone would say "[[IAmNotSpock He played Ted]]". Nowadays, it'd likely say "He played [[Film/TheMatrix Neo]]", though now it's averted since he's signed on to another sequel.
* TheOtherDarrin: The princesses are played by different actresses.
** SugarWiki/MostTriumphantExample (partly)