Sven is a character that is featured on ABC's Once Upon a Time. He is Kristoff's pet reindeer, is portrayed by a reindeer named Jack, and is voiced by Mark Goldman.
- Sven is based on the reindeer from the Disney film Frozen, an adaptation of the fairytale The Snow Queen.
- S4, E01: "A Tale of Two Sisters" (flashback)
- S4, E03: "Rocky Road" (flashback)
- S4, E04: "The Apprentice" (flashback)
- S4, E06: "Family Business" (flashback)
- S6, E22: "The Final Battle, Part Two"