i, monster (1971)

Unknown.
Christopher Lee's character injects a drug into his pet cat, which goes mad, trashing his laboratory, before he then kills it.
Later Peter Cushing walks about his apartment whilst stroking a tabby.

las vegas hillbillys (1966)

Unknown.
White cat that Jayne Mansfield carries with her whilst driving!

mars attacks (1996)

Muffy.
Stuffed cat doted on by pensioner Florence Norris, who accidentally stumbles on how to kill those pesky aliens.

bringing up baby (1938)

Baby.
Baby Susan Valce's pet leopard, which gets mixed up with a wild leopard who has escaped from a zoo, in this romantic comedy farce.
The cats real name was Nissa.

rhubarb (1951)

Rhubarb.
An eccentric millionaire leaves his fortune, including a Baseball team, to a feral cat, he had adopted. The teams publicist Eric Yeager (Ray Milland) has to convince the team that the cat is good luck, whilst trying to keep Rhubarb's wilder side in check, and his fiance (who is allergic to cats), from leaving him. A screw-ball comedy that ricochets around at frightening speed as Rhubarb cause chaos to everyone around him.
The first appearance of Orangey, who went onto star in Breakfast At Tiffany's amongst others.

Sue-Lynn.
A longhaired white cat who with her two sisters sires lots of kittens with Rhubarb at the end of the film.

bell, book and candle (1958)

Pyewacket.
A beautiful witch Gillian (Kim Novak) lives in Greenwich Village with her familiar Pywacket the cat. She takes a fancy to Shep (James Stewart) and casts a spell to make him fall in love with her. Unfortunately all doesn't go to plan and Gillian has to learn some hard lessons before she can win his heart.

breakfast at tiffany's (1961)

Cat.
'Poor slob without a name', as Holly Golightly the central character says of her pet cat. In both the book and the film the cat has a central role, especially the end, when Holly throws Cat out of a taxi into the rain, in a fit of peak. Here the film differs from the book as Holly realises the error of her ways and is tearfully re-united with Cat.
The cat with real personality was Orangey, a star of numerous films including Rhubarb and Comedy of Terrors.

nude for satan (1974)

Unnamed.
Black cat that surprises a woman staying in a remote castle, in this frankly bonkers and very confusing film.

shadow of the cat (1961)

Tabitha.
Tabby sits patiently as her owner reads The Raven by Edgar Allan Poe, and then whilst a man murders the woman. You know the cat isn't going to stand idly by as its source of easy food is snuffed out, and this is so. The cat manages to exact its own revenge on the perpetrators of the deed in its own way.

cat people (1942)

Unknown
A Serbian immigrant to America believes that she will turn into a murderous cat if she gets intimate with a man. A real problem when she marries! She meets the lucky man whilst studying a black panther in New York zoo. He then buys her a kitten, but has to take it back to the pet shop when the otherwise cute cat snarls and hisses at her. Her love rival seems to get on better with cats, and we briefly glimpse her's at one point.
John Paul Jones
But whilst she fears intimacy, jealousy gets a greater hold over her, when she suspects her husband of turning to a work colleague. One that seems to like the office cat.