"I'm in the Mood for Dancing" is a single by the Irish pop group The Nolan Sisters (later to become The Nolans). Originally released in December 1979, the song became a top-three hit in the UK in February 1980. A blend of pop and disco, it has since become synonymous with the group and remains their biggest hit. It was also a hit in many countries around the world. In Japan and South Africa, it reached number one.