The Cassandra Cat (Czech: Až přijde kocour, lit. 'When the Cat Comes'; also released under the titles When the Cat Comes; The Cat Who Wore Sunglasses; One Day, a Cat; and That Cat) is a 1963 Czechoslovak New Wave satirical surrealistic fantasy comedy-drama film co-written and directed by Vojtěch Jasný.

One of the most celebrated, influential and expressive pictures of the Czechoslovak New Wave cinema, and although on its surface it is a family-friendly, light-hearted, colourful fantasy dramedy film, in its core the film is subtly a political allegory for authoritarianism, false appearances and hypocrisy, with the cat symbolic being able to see the people of the town for their true colours.