- The Danza: Byun Hee-bong as Mija's grandfather Joo Hee-bong. Not the actor's first time.
- Playing Their Own Twin: Tilda Swinton plays both Lucy and Nancy Mirando.
- Production Posse: Byun Hee-bong and Yoon Je-moon, who have both turned up in a few of Bong's previous films, feature here.
- Shout-Out: Names that sound like letters, specifically J and K, and other characters with color-themed names.
Trivia / Okja