Formed in December 1991, the group originally consisted of vocalist Ben Guzman, guitarists Aaron Barrett and Lisa Smith, bassist Matt Wong, keyboardist Zach Gilltrap and drummer Andrew Gonzales.
The group's current lineup features Barrett, who took over as lead vocalist in 1993, alongside trombonist Dan Regan (who first joined in 1994), trumpeter John Christianson (since 2004), bassist Derek Gibbs (since 2007), saxophonist Matt Appleton (since 2011) and drummer Ed "Smokey Beach" Larsen (since 2014).
[1] The original lineup featured Ben Guzman, Aaron Barrett, Lisa Smith, Matt Wong, Zach Gilltrap and Andrew Gonzales, who released the band's first self-titled demo tape (known as In the Good Old Days...) in 1992.
[15] In June 2007, founding member Matt Wong announced his departure from the band in order to "settle down and be a family man"; he was replaced by the Forces of Evil bassist Derek Gibbs.
[17] In January 2011, long-term trumpeter and multi-instrumentalist Scott Klopfenstein left the group for a similar reason as Wong, stating that he wanted to "dedicate his life to raising a family".
In July 2024, Ice Nine Kills released a cover of "Walking On Sunshine" in collaboration with Reel Big Fish, featuring Dan Regan as a credited band member for the first time since 2013.