- Eden Sher (Star Butterfly (voice))
- Adam McArthur (Marco Diaz (voice))
- Alan Tudyk (Ludo / King River Butterfly (voice))
Episode: Monster Bash
Air Date: 2017-11-16
Runtime: 22 min
All the youth of Mewni gather at the ancient Monster Temple to celebrate a new era of monsters and Mewmans living together in peace -- until guests start disappearing.