The Interrex (plural interreges) was literally a ruler "between kings" (Latin inter reges) during the Roman Kingdom and the Roman Republic. He was in effect a short-term regent.

The office of interrex was supposedly created following the death of Rome's first king Romulus, and thus its origin is obscured by legend. The Senate of the Roman Kingdom was at first unable to choose a new king. For the purpose of continuing the government of the city, the senate, which then consisted of one hundred members, was divided into ten decuriae (groups of ten); and from each of these decuriae one senator was nominated as decurio. Each of the ten decurios enjoyed in succession the regal power and its badges for five days as interrex; and if no king was appointed at the expiration of fifty days, the rotation began anew. The period during which they exercised their power was called an interregnum and at that time lasted for one year, after which Numa Pompilius was elected as the new king.

After the death of each subsequent king an interrex was appointed by the senate. The interrex's function was to call a meeting of the Comitia Curiata which would elect a new king.

Static-X is an American industrial metal band from Los Angeles, California. They were formed in 1994. They are signed to Warner Bros. Records and have released six albums, their most recent being Cult of Static, which was released on March 17, 2009.

The band rose to fame with their debut album Wisconsin Death Trip, which went platinum in 2001. However, this is the only album they have released to date that has reached such sales levels. Their sound incorporates elements of a sub-genre called industrial metal. Static-X often refer to themselves as "evil disco".

Static-X has released six studio albums, one compilation album, one EP, twelve singles, twelve videos and a guitar tab book entitled Static-X Guitar Anthology. They recorded a DVD entitled Where the Hell Are We and What Day Is It... This Is Static-X, but it was never released due to a threatened lawsuit by Sharon Osbourne over tracks recorded at Ozzfest.

Static-X was founded in 1994 after the disbandment of Wayne Static and Ken Jay's former band Deep Blue Dream. Static and Jay originally met at the Chicago record store where Jay worked and were introduced to one another by Smashing Pumpkins vocalist Billy Corgan (the band also shared a rehearsal space with Smashing Pumpkins for a time).^{[citation needed]} Once Deep Blue Dream folded, Static and Jay joined the Chicago metal band Stygian and recorded a demo under the band name Drill only to later move to Los Angeles to search for new band members. There, they met bassist Tony Campos and guitarist Koichi Fukuda, completing the band's original lineup. Originally, they were meant to be called the name of their debut album, Wisconsin Death Trip, but figured it was too long and went with Static-X.^{[citation needed]}