Olive, the Other Reindeer

Olive, the Other Reindeer is a 1999 animated film about an anthropomorphic Jack Russell terrier (voiced by Drew Barrymore) who, because she does not act like other dogs and because she mishears the phrase "all of the other reindeer" as "Olive, the other reindeer", believes she is actually a reindeer and makes her way to the North Pole to assist Santa's Christmas run by replacing Blitzen, who is sick.

The film, developed originally as a Christmas television special, is based on a 1997 children's book by Vivian Walsh.