* Duchess: The elegant mother cat and main protagonist.
* Marie: The sweet and dainty kitten.
* Berlioz: The mischievous and musical kitten.
* Toulouse: The playful and energetic kitten.
* Madame Adelaide Bonfamille: The wealthy owner of the cats.
* Frou-Frou: The old and pampered cat who lives with Madame Bonfamille.
* Abigail: The kindly housekeeper who cares for the cats.
* The Siamese Cats: These cats, who are antagonists in the film, include:
* Si and Am: The male Siamese cats.
* Sago: The female Siamese cat.