Thriller 25 is the 25th anniversary edition reissue of American recording artist Michael Jackson's sixth studio album Thriller. The original album sold between 51 and 65 million copies worldwide, making it the world's best selling album of all time. The prospect of a "second chapter" to Thriller was first publicly discussed on Access Hollywood in late 2006. Jackson said he would discuss the idea with collaborator will.i.am. It was released in Australia on February 8, 2008, internationally on February 11, 2008, and in the United States on February 12, 2008 by Epic Records, Legacy Recordings and MJJ Productions.
Thriller 25 was released by Sony BMG's re-issue division, Legacy Recordings. In the United Kingdom, the BBFC gave it a '15' certificate because it included the video for "Thriller". It is the first Jackson album with an age certificate. Along with the original material, the reissue contained remixes, new material, a DVD and collaborations with several contemporary artists.
Two singles, "The Girl Is Mine 2008" and "Wanna Be Startin' Somethin' 2008", were released from the album to moderate success and a number of the other remixes charted, despite no physical release. Thriller 25 was a commercial success, selling three million copies worldwide in its 12 weeks, and was generally well received among critics, despite their view that the new material was not as inspiring as the original.