Kenneth Halliwell

In 2014, a collage by Halliwell was purchased by Islington Museum at auction for £2,800. In 2016 the same museum purchased at auction The Cat Screen, a four-panel described as "an important part of 1960s cultural history as well as an engaging piece of art work", for £8,000.

Halliwell is the subject of a monologue, Especially The Latter Part, by Richard Ely. It premiered in Lichfield, in 2009.

The stage version of Prick Up Your Ears, written by Simon Bent, opened on the West End in London at the Royal Theatre on 17 September 2009. Matt Lucas played Halliwell and Chris New played Orton. Con O'Neill took over the role of Halliwell after Lucas pulled out. The play closed on 15 November 2009.

In Fantabulosa!, the 2006 television play about Kenneth Williams, he was portrayed by Ewan Bailey.

British experimental music group Coil recorded three tracks titled "The Halliwell Hammers" for their 1995 album Worship the Glitch. The two primary members of Coil, John Balance and Peter Christopherson, were romantic partners through most of the band's existence, and much of their work was inspired by or dedicated to gay icons and personalities of the past.

In Prick Up Your Ears, the 1987 film based on Orton's life, Halliwell was portrayed by Alfred Molina.

On 9 August 1967, Halliwell mortally injured Orton with nine hammer blows to the head, then overdosed on pentobarbital (Nembutal) sleeping pills. Halliwell died first. Their bodies were discovered late the following morning, when a chauffeur arrived at the door of their Noel Road flat in Islington to collect Orton for a meeting with director Richard Lester to discuss filming options on Up Against It, an unproduced script by Orton, written in 1967 for The Beatles.

From January 1959, Orton and Halliwell were involved in the theft and defacement of public library books. Halliwell became an illicit collage artist, while Orton wrote the fake blurbs for the flyleaf of the dust jackets. After their trial in 1962 the two men were given custodial sentences, Halliwell was sent to HM Prison Ford in Sussex for six months; Orton went to Eastchurch in Kent.

In 1951, he met fellow RADA student Joe Orton. Both men were struggling actors who became struggling writers; their common interests led to a lengthy romantic relationship. Halliwell, in the early years, seems to have been something of a mentor to Orton, who had had a rather cursory education, and helped to mould the writing style that would later be called "Ortonesque". The two men collaborated on several novels, including The Boy Hairdresser, which were not published until after their deaths.

Halliwell was a classics scholar at Wirral Grammar School, where he gained his Higher School Certificate in 1943. Eligible for military service in 1944, he registered as a conscientious objector, and was exempted conditional upon becoming a coal miner. After discharge in 1946, he acted for a time in Scotland and then returned home to act in Birkenhead. His father committed suicide in 1949 by inhaling coal-gas in a gas oven; Halliwell was the first to find the body the following morning, but he "stepped over the body, put the kettle on, made a cup of tea and had a shave" before he reported the death. Halliwell later moved to London to study drama at the Royal Academy of Dramatic Art (RADA), having inherited the family fortune.

Kenneth Leith Halliwell (23 June 1926 – 9 August 1967) was a British actor, writer and collagist. He was the mentor, boyfriend, and murderer of playwright Joe Orton.