"When Two Worlds Collide" is a country music song written by Roger Miller and Bill Anderson. It was first recorded and released by Roger Miller in 1961. The song achieved significant success and became one of Miller's signature songs. Roger Miller's version of the song reached number two on the Billboard Hot Country Singles chart in 1961. It became one of his most recognizable hits and helped establish his career as a country music artist. The song's popularity led to covers by other artists, in