Shirley is a minor-reoccurring character in the ALVINNN!!! and The Chipmunks television series. She is one of Miss Croner's cats.


When Shirley was first introduced in the episode Good Luck Mr. Whiskers she resembled a brown Tabby cat with white fur on her lower legs, face and neck. As of The Cat Sitter, Shirley has since appeared to be a Siamese cat with sand colored fur and dark brown fur on her feet, tail, ears and face.


Shirley is Miss Croner's oldest cat and is known for being a bed wetter and her need for eye drops. She doesn't like taking the eye drops though and becomes feisty when she is given them, such as when Theodore tries to give them to her and scratches him.


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