"Cruella De Vil" is a song featured in Disney's 1961 animated film One Hundred and One Dalmatians. Performed by Bill Lee as Roger Radcliffe, the number mocks the film's villainess, Cruella De Vil.
Like in the original film, the song serves as Cruella's theme in 101 Dalmatian Street. It is first heard at the end of "London, We Have a Problem," teasing Cruella's appearance later in the series. The song is also used as background music for "Better the De Vil You Know" and "The De Vil Wears Puppies" (in the latter, the song is used in a game on Cruella's phone and is revealed to be Hunter's ringtone).