Guy Stevens (13 April 1943 – 28 August 1981) was a British music industry figure whose roles included DJ, record producer and band manager. He was influential in promoting R&B music in Britain in the 1960s, gave the rock bands Procol Harum and Mott the Hoople their distinctive names and co-produced The Clash's album London Calling.

Stevens was born in East Dulwich, London. His father Edgar died when he was six, and at the age of 11 he was enrolled at Woolverstone Hall boarding school near Ipswich. After being expelled for rebelliousness, he started work with his brother in the insurance industry, at the same time starting a record collection of blues and R&B records, imported from the U.S. He married Diane Cox in 1965 and had a son the following year.

In 1963, he started a weekly "R&B Disc Night" at the Scene Club in Soho, run by Ronan O'Rahilly, at which Stevens often played obscure Stax, Chess and Motown records, attracting a growing number of mod clubgoers and musicians, including members of The Who, The Small Faces, The Yardbirds, The Rolling Stones and The Beatles. Stevens compiled and annotated reissues and compilations of American records, particularly for EMI. He wrote the first UK press profiles of such musicians as Muddy Waters and Howlin' Wolf in the Record Mirror.

Stevens was approached by record company executive Chris Blackwell in 1964 to run the Sue record label in the UK, as an offshoot of Island Records. He took responsibility for releasing a string of successful R&B singles on Sue in the UK, including records by Ike and Tina Turner, Rufus Thomas, Elmore James, Wilbert Harrison, Donnie Elbert, and Inez and Charlie Foxx. He also compiled and annotated The Sue Story compilation LPs. Stevens used the Sue label to put out obscure American singles not only from the U.S. Sue group of labels, but from many small independent record companies, and some of the bigger ones. It became widely influential. Stevens was also president of the Chuck Berry Appreciation Society, and had a say in the UK releases that Pye International put out by Berry, Bo Diddley and others on the Chess and Checker labels. It was Guy Stevens who brought Berry to the UK for his first tour after paying his bail to get him out of jail for offences under the Mann Act.

He broke into record production at Blackwell's suggestion in 1965, firstly on a single by Alex Harvey and then producing live albums by Larry Williams and Lee Dorsey. The following year, he was appointed head of A&R at Island Records. His first signing to the label was Birmingham band The V.I.P.s, who soon changed their name to Art. Stevens produced their early recordings, before they added keyboardist Gary Wright to become Spooky Tooth. Stevens also managed and produced Hapshash and the Coloured Coat, an artistic and musical collaboration between the band Art and designers Michael English and Nigel Waymouth, which led to the album Featuring the Human Host and the Heavy Metal Kids.

Stevens also introduced lyricist Keith Reid to keyboardist Gary Brooker of The Paramounts. He encouraged them to write together, and reportedly commented to Reid at a party that a friend had turned "a whiter shade of pale". The resulting song was recorded by Brooker's newly formed band, named Procol Harum by Stevens, and – though turned down by Blackwell at Island – went on to become one of the defining songs of the era.

In 1967, Stevens was imprisoned for several months for drug offences, during which time his record collection was stolen, leading to a breakdown. However, on his release he returned to Island Records, and produced albums by Free, Mighty Baby, and Heavy Jelly.

While working for Island, Stevens was fundamental in the formation of Mott the Hoople. The band was originally called "Silence," with the line-up of Stan Tippins on vocals, Mick Ralphs on lead guitar, Verden Allen on keyboards, Overend Watts on bass, and Dale Griffin on drums. Envisioning a band with a sound that would be a combination of The Rolling Stones and Bob Dylan, Stevens recruited and mentored Ian Hunter as lead singer, and demoted Stan Tippins to road manager. Stevens also named the band after the Willard Manus novel, which he had read while in prison.