- Kristoff as Peter Venkman
- Olaf as Raymond Stantz
- Elsa as Dana Barrett
- Pabbie as Baby Oscar
- The King of Arendelle as Egon Spengler
- Gothi as Louis Tully
- Sven as Winston Zeddmore
- Anna as Janine Melenitz
- The Duke of Weselton as Dr. Janosz Poha
- Prince Hans as Vigo the Carpathian
- Young Kristoff as Psychiatric Doctor
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