- Fake American: British actor Tom Holland fakes an American accent once again as Ian.
- Fan Nickname: Due to the premise of the film, some people, especially anime fans, has nicknamed it as "Fullmetal Troll-chemist".
- Relationship Voice Actor: Ian and Barley are Spider-Man and Star-Lord.
- Voices in One Room: Holland and Pratt did some recording sessions together.
- Write What You Know: Like Ian and Barley, director Dan Scanlon never knew his father, and was inspired to write this story after he and his older brother discovered a recording their father made before his death.
Trivia / Onward