Effective period / Period of releases: 2001 - 2017

Members: Justin Hill, Mikee Goodman, Dan Foord, Dan Weller, James Leach, Graham Pinney, Joe Rosser

SikTh (official capitalization) is a progressive metal/mathcore band from Watford, Hertfordshire, England, UK.

SikTh formed in late 1999, but consolidated their line-up in March 2001. That line-up consisted of dual vocalists Mikee Goodman and Justin Hill, guitarists Dan Weller and Graham Pinney, bassist James Leach and drummer/percussionist Dan Foord.

On 8 May 2007, it was announced that vocalists Mikee Goodman and Justin Hill would be leaving the band at the conclusion of the July 2007 "The Black Summer Starts Here" UK tour set, due to their ongoing projects and producing careers. Mikee Goodman's and Justin Hill's final performance in SikTh was at the Carling Academy, Islington, London on 14 September 2007 (this was a rescheduled show).

On 27 May 2008, SikTh announced that the band had decided to split due to numerous factors. The main reasons cited for their breakup was the inability to find a replacement for Mikee and Justin, as well as commitment to other projects.

In late 2013 the band reunited again.

Current members:
Mikee Goodman - vocals (1999-2007, 2013-present)
Dan Weller - guitar, piano (1999-2008, 2013-present)
Graham "Pin" Pinney - guitar (1999-2008, 2013-2018, 2022-present)
Dan "Loord" Foord - drums, percussion (2001-2008, 2013-present)
James Leach - bass (2001-2008, 2013-present)
Justin Hill - vocals (2001-2007, 2013-2016, 2022-present)

Former members:
Tristan Lucey - vocals (1999-2000)
Jamie Hunter (1999-2000)
[unknown name] (1999–2001)
Joe Rosser - vocals (2016-2021)