Jonesy from Alien
The cat from the 1979 film Alien is an iconic character in science fiction history. Known simply as Jonesy, the unofficial mascot of the USCSS Nostromo serves as both a companion and a plot device throughout the film.

Image courtesy of reddit.com
This cat was played by several different feline actors, including a ginger and white one, who starred in most of the scenes. Despite its limited role in the movie, Jonesy has become a fan favorite. Its survival instincts and agility also make it an unlikely hero!