The Thin Man Dog is ASTA, a wire-haired fox terrier who starred in the 1934 film The Thin Man. ASTA was owned by William Powell and Myrna Loy's characters in the movie, Nick and Nora Charles. ASTA was played by a real-life dog named Skippy, who was trained by his owner, Henry East. Skippy was known for his ability to perform complex tricks and stunts, which made him a popular choice for films of the time.