Mark Colbert Kelly, Irish keyboardist and a member of the neo-progressive rock band Marillion, is born in Dublin on April 9, 1961.

Kelly is raised in Ireland until he moves to England with his parents in 1969.

Kelly is an electronics student while performing part-time in the progressive/psychedelic band Chemical Alice, who releases their EP Curiouser and Curiouser in 1981. He is invited to join Marillion when they supported Chemical Alice, replacing founding keyboardist Brian Jelliman. His first performance with the band is at the Great Northern at Cambridge on December 1, 1981. He appears on every Marillion studio album. He also appears on John Wesley‘s album Under the Red and White Sky in 1994 and on Jump’s album Myth of Independence in 1995 on production and keyboards.

Kelly plays keyboards with Travis for their headlining set at the Isle of Wight Festival (June 10-12, 2005), and at T in the Park in 2005. He plays keyboards for Edison’s Children‘s new album In the Last Waking Moments…, featuring fellow Marillion member Pete Trewavas and Eric Blackwood, for the song “The ‘Other’ Other Dimension” as well as performing vocals with Steve Hogarth and Andy Ditchfield (DeeExpus) on the Edison’s Children track “The Awakening” in 2011.

Kelly is credited with inventing online crowdfunding to fund the recording of Marillion’s 2001 album Anoraknophobia, following a fan funded Marillion tour of the United States in 1997, and pioneers many of the ideas copied by other music artists since. He is made Co-CEO of the Featured Artists’ Coalition (FAC), an organization which represents the interests of music artists in the digital age. He stands down as a director of the FAC in 2018. From 2009 until 2020 he is an elected performer-director of Phonographic Performance Limited (PPL).

In 2016, Kelly is cast as a guest keyboardist in Ayreon‘s 2017 album The Source.

In September 2020, Kelly releases a single “Amelia” with his new solo band, Mark Kelly’s Marathon. The debut album is released in November 2020.