Sleep Theory
New-generation alt-metal built on a soulful clean vocal and a very modern low end, and the format's next arena act in waiting.
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About Sleep Theory
Sleep Theory is an alt-metal band from Memphis, TN, formed in 2019.
Sleep Theory formed in Memphis, Tennessee, in 2019, starting as a solo recording project for vocalist Cullen Moore, a US Army veteran. Bassist Paolo Vergara joined early on, and the band settled into its current lineup with guitarist Daniel Pruitt, who also handles unclean vocals, and drummer Ben Pruitt. The group built its following largely through streaming and short-form video rather than years of club touring.
Musically the band sits between post-grunge and modern metalcore, setting down-tuned, rhythmically heavy guitar and programmed low end against Moore's melodic, R&B-inflected clean vocal. That contrast between soulful lead singing and aggressive instrumentation remains the band's clearest identifying feature. Members have cited Linkin Park, Bring Me the Horizon, Issues, Bad Omens, Beartooth, Saosin and Michael Jackson as influences.
The band's debut EP, Paper Hearts, arrived in 2023, preceded by the singles "Another Way" and "Numb". Streaming carried the release well past typical debut numbers, with the EP generating more than 33 million streams within months, before the band had toured extensively behind it.
A debut album, Afterglow, followed in May 2025 after being announced that February. Sleep Theory supported it with a US tour later in the year alongside acts including Falling in Reverse, Papa Roach and The Used, then set a UK and European run for early 2026.
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Questions about Sleep Theory
What festivals is Sleep Theory playing in 2027?
Sleep Theory is booked at 2 festivals we cover: Welcome to Rockville 2027, Sonic Temple 2027.
Is Sleep Theory on tour?
Yes. Sleep Theory has 5 shows listed, from Praha 9, Czechia on Nov 24, 2026 to Brisbane, Australia on Feb 15, 2027, plus 2 festivals on the page above.
Is Sleep Theory playing Welcome to Rockville 2027?
Yes, Sleep Theory is on the Welcome to Rockville 2027 lineup, May 6–9, 2027 at Daytona International Speedway, Daytona Beach, FL. They play Saturday, May 8.
Is Sleep Theory playing Sonic Temple 2027?
Yes, Sleep Theory is on the Sonic Temple 2027 lineup, May 13–16, 2027 at Historic Crew Stadium, Columbus, OH. They play Saturday, May 15.
Where is Sleep Theory from?
Sleep Theory is from Memphis, TN.
When did Sleep Theory form?
Sleep Theory formed in Memphis in 2019.
What was Sleep Theory's first album?
Sleep Theory's first album was Afterglow (2025).
What kind of music does Sleep Theory play?
Sleep Theory plays alt-metal, post-hardcore and rock.
What festivals has Sleep Theory played before?
Sleep Theory has played Sick New World Texas 2026, Aftershock 2026, Louder Than Life 2026, Download 2026.