Jennyanydots is a fictional character from T. S. Eliot's 1939 poetry book Old Possum's Book of Practical Cats. She is also a principal character in the 1981 Andrew Lloyd Webber musical Cats, which is based on Eliot's work. Jennyanydots is a seemingly lazy Jellicle cat who sits around all day, but at night, she becomes very active as she rules the mice and cockroaches, forcing them to undertake helpful functions and creative projects to curb their naturally destructive habits.