The Pet Sounds Sessions is a 4-CD box set by the American rock band the Beach Boys. Released on November 4, 1997, by Capitol Records, it compiles tracks from the group's 11th studio album Pet Sounds (1966) and its 1965–66 recording sessions. The entire album is included in its original mono mix, as well as a specially-created digital stereo mix. The set also contains instrumental tracks, vocals-only tracks, alternate mixes, and edited highlights from the recording sessions for many of the album's songs, along with several tracks not included on the album.

Pet Sounds is the eleventh studio album by the American rock band the Beach Boys, released on May 16, 1966 by Capitol Records. It was initially met with a lukewarm critical and commercial response in the United States, peaking at number 10 on the Billboard Top LPs chart. In the United Kingdom, however, the album was lauded by critics and reached number 2 on the Record Retailer chart, remaining in the top ten for six months. Promoted there as "the most progressive pop album ever", Pet Sounds was recognized for its ambitious production, sophisticated music, and emotional lyrics. It is now considered to be among the greatest and most influential albums in music history.