"Thriller" is a song by American recording artist Michael Jackson from his sixth studio album of the same name. It was released on January 23, 1984 by Epic Records, as the seventh single from the album. The song has appeared on multiple greatest hits compilation albums from Jackson, including HIStory (1995) and This Is It (2009). It was written by Rod Temperton and produced by Jackson and Quincy Jones. The song, which has a voice-over rap from actor Vincent Price, had originally been titled "Starlight".

Musically "Thriller" is a dance-oriented song; the song's instruments include a bassline and synthesizer. Jackson's voice is heard in a low register while a continuous arrangement of synthesizers is heard along the bassline. In the song, sound effects such as a creaking door, thunder, feet walking on wooden planks, winds and howling dogs can be heard, and the lyrics contain frightening themes and elements. "Thriller" received positive reviews from critics, though the song was outshone by its music video. "Thriller" became Jackson's seventh top-ten single on the Billboard Hot 100 Chart from the album, while reaching the top of the charts in France and Belgium and the top ten in other countries.

"Thriller" was adapted into a highly successful music video, known independently as "Michael Jackson's Thriller". At fourteen minutes the video is substantially longer than the song, which ties together a narrative featuring Jackson and actress Ola Ray in a setting heavily inspired by horror films of the 1950s. In the video's most iconic scene, Jackson leads other actors costumed as zombies in a choreographed dance routine. Though it garnered some criticism for its occult theme and violent imagery, the video was immediately popular and received high critical acclaim, being nominated for six MTV Video Music Awards in 1984 and winning three. Since its release "Thriller" has been often labeled the greatest music video ever made. In 2009 it was added to the National Film Registry by the Library of Congress, the first music video ever selected.