Marillion are a British rock group. Formed in Aylesbury, Buckinghamshire, England in 1979, their recorded studio output comprises fifteen albums and is generally regarded as comprising two distinct eras, delineated by the departure of original vocalist & frontman Fish in late 1988 after their first four albums, and the subsequent arrival of replacement Steve Hogarth ("h") in early 1989. Marillion has now released eleven albums thus far with Hogarth.
The core lineup of Steve Rothery (the sole 'pre-Fish' original member), Pete Trewavas, Mark Kelly and Ian Mosley is unchanged since 1984. The band has enjoyed critical and commercial success with a string of UK Top Ten hits spanning their career, an estimated fifteen million total worldwide album sales and even an entry into the Guinness Book of World Records.
The band's music has changed stylistically throughout their career. The band themselves have stated that each new album tends to represent a reaction to the preceding one, and for this reason their output is difficult to 'pigeonhole'. Their original sound (with Fish on vocals) is best described as guitar and keyboard led progressive rock or "neo-prog", and has sometimes been compared with 1970's era Genesis.