[5] During an interview with The Guardian's Rob Fitzpatrick, Marshall said that from a young age, he experienced discipline issues and refused to go to school.

[1] He claims that the tests took a toll on him; that the doctors, counsellors and psychiatrists were wrong most of the time; that he hated everybody; and that he would hide in his room for hours on end.

[1] During an interview with NPR, Marshall recalled that he often created art in many different media, as his parents encouraged creativity throughout his childhood.

In July 2011, Marshall began playing under a new moniker, King Krule, at a festival in Hyères, France.

[10] King Krule released his debut album 6 Feet Beneath the Moon on 24 August 2013, his 19th birthday.

[15] In December 2015, under the name Archy Marshall, he released an album titled A New Place 2 Drown, which includes 12 songs, a 208-page book of visual art and text and a ten-minute documentary.

[6] Marshall took to NTS Radio, hosted by Mount Kimbie, and released two songs under the name Edgar the Beatmaker.

[26] On 20 June 2024, King Krule released the EP SHHHHHHH!, along with a self-directed music video for the song "Time for Slurp".

[27] Many reviewers and journalists have noted King Krule's unusual transcendence and appropriation of disparate genres.

[32] Jason Lymangrover of Allmusic states that his songs are mainly in the form of ballads with major seventh chords, but by contrast there is also a "grittiness" to Archy's voice and persona, portraying him as "the type of kid who would be quick to throw a punch without asking questions.

[33] He is inspired by disparate influences such as Elvis Presley, Gene Vincent, Josef K, Chet Baker, Fela Kuti, J Dilla, Billy Bragg, Aztec Camera (his godfather is the band's former drummer, Dave Ruffy) and The Penguin Cafe Orchestra.

[35] Marshall's lyrics, according to a Flaunt magazine interview, generally consist of romance, sex, aggression, conflict, and depression.

I used to read lots of poetry and sit there for ages trying to decipher the meaning, or work out the narration behind it all, then I found my own form of that.

[37] In 2019, Patmore directed Hey World!, a video preceding the release of Marshall's album Man Alive!.