the godfather (1972)

Unknown
As Vito Corleone, the titular Don of the Corleone crime family dresses down someone who is begging for his help, he toys with a young cat, that plays in his lap. As supposed touch that wasn't in the script, but was a late addition as the director saw the cat wandering round the set, and handed it to Marlon Brando

shadow of the thin man (1941)

Unknown
Asta the dog charges into a changing room whilst its owner explains his dog isn’t afraid of anything, but on entry Asta finds a kitten there which sends Aster cowering when it meows at him.

blitz (2024)

Olly
Set in the east end of London during the blitz of WWII, this sees Elliott Heffernan objecting to him being evacuated. Forced to leave his mother, grand-father and cat, who pops up in multiple scenes and we see surviving the bombing of their street.
Olly is credited to two actors, Tinkerbell and Zinger.

nowhere to go (1958)

Unknown
Long haired calico cat walks through a London mews at night. The next day the same cat is seen walking along a wall and into a flat through an open window, waking a man as it walks over him.

warn that man (1943)

Unknown
A spy is distracted by a noise whilst searching a house. Only to find that a neighbourhood cat has knocked over a vase.

account rendered (1957)

Sasha
A man is handed a friends pet cat to look after whilst he goes away to Paris.

model for murder (1959)

Chloe
A fashion stylists pet cat unwhittingly becomes involved in a diamond heist.