* CelebrityVoiceActor: Prominent in both the original Japanese (obviously), as well as the U.S. and the UK English dubs.
** In the U.S. English dub, there's Creator/DavidHenrie as [[DubNameChange Shawn]] (Sho), Music/BridgitMendler as Arrietty, [[RealLifeRelative then-real-life couple]] Will Arnett and Creator/AmyPoehler as Arrietty's parents, and Carol Burnett as Haru (the housemaid).
** In the UK English dub, Creator/SaoirseRonan voices Arrietty, and Creator/MarkStrong voices Pod.
* PlayingAgainstType: Comedic actor Will Arnett voicing the Creator/HarrisonFord-esque Pod.
* PromotedFanboy: French singer/songwriter Cécile Corbel became known to Ghibli filmmakers after she sent them a fan letter showing her love for their films along with a copy of ''Songbook, Vol 2", at the time, her most recent album. After Toshio Suzuki (the film's head producer) listened to the CD, she received an e-mail asking her if she could write a song for the movie. She ended up composing the entire score.