Thriller is the sixth studio album by the American singer and songwriter Michael Jackson, released on November 29, 1982, by Epic Records. It was produced by Quincy Jones, who had previously worked with Jackson on his 1979 album Off the Wall. Jackson wanted to create an album where "every song was a killer". With the ongoing backlash against disco music at the time, he moved in a new musical direction, resulting in a mix of pop, post-disco, rock, funk, and R&B sounds. Thriller foreshadows the contradictory themes of Jackson's personal life, as he began using a motif of paranoia and darker themes. Paul McCartney appears on "The Girl Is Mine", the first credited appearance of a featured artist on a Michael Jackson album. Recording took place from April to November 1982 at Westlake Recording Studios in Los Angeles, California, with a budget of $750,000.

Thriller became Jackson's first number-one album on the US Billboard Top LPs & Tapes chart, where it spent a record 37 non-consecutive weeks at number one, from February 26, 1983, to April 14, 1984. Seven singles were released: "The Girl Is Mine", "Billie Jean", "Beat It", "Wanna Be Startin' Somethin' ", "Human Nature", "P.Y.T. (Pretty Young Thing)", and "Thriller". They all reached the top 10 on the US Billboard Hot 100 chart, setting a record for the most top 10 singles from an album, with "Beat It" and "Billie Jean" reaching number one. Following Jackson's performance of "Billie Jean" in the Motown 25 television special, where he debuted his signature moonwalk dance, the sales of the album significantly increased, selling one million copies worldwide per week. The "Thriller" music video was premiered to great anticipation in December 1983 and played regularly on MTV, which also increased the sales.

With 32 million copies sold worldwide by the end of 1983, Thriller became the best-selling album of all time. It was the best-selling album of 1983 worldwide, and in 1984 it became the first album to become the best-selling in the United States for two years. It set industry standards with its songs, music videos, and promotional strategies influencing artists, record labels, producers, marketers, and choreographers. The success gave Jackson an unprecedented level of cultural significance for a black American, breaking racial barriers in popular music, earning him regular airplay on MTV and leading to a meeting with US President Ronald Reagan at the White House. Thriller was among the first albums to use music videos as promotional tools; the videos for "Billie Jean", "Beat It" and "Thriller" are credited for transforming music videos into a serious art form.

Thriller is the best-selling album of all time, with sales of 70 million copies worldwide. It is the best selling non-compilation album and second-best-selling album overall in the United States and was certified 34× platinum by the Recording Industry Association of America (RIAA) in 2021. It won a record-breaking eight Grammy Awards at the 1984 Grammy Awards, including Album of the Year, while "Beat It" won Record of the Year. Jackson also won a record-breaking eight American Music Awards at the 1984 American Music Awards. The album has been a frequent inclusion in lists of the greatest albums of all time. In 2008, it was inducted into the Grammy Hall of Fame. In the same year, the Library of Congress added it to the National Recording Registry of "culturally, historically, or aesthetically significant recordings".