Morgan Nicholls is a British musician, who has formerly played in early-'90s band Senseless Things, a semi-solo project called Morgan and The Streets, amongst others. He has also contributed as a session musician to Gorillaz and is widely rumoured to be the inspiration for the Gorillaz character/bass player Murdoc Niccals.

In 2002, Morgan was involved as a producer on Queenadreena's Drink Me

In August 2004 he temporarily joined the rock band Muse on tour, filling in for bass player Chris Wolstenholme who had broken his arm. Morgan's first appearance with the band was at the V Festival in the UK.

As of 2006, following the release of Muse's album Black Holes and Revelations, with its multilayered instrumentals and synths requiring an extra musician onstage with the band, Morgan was drafted in and is now an almost permanent live fixture with the band, contributing synths, backing vocals and various keyboard parts to their live set-up. He properly debuted with Muse when they headlined the Radio 1's Big Weekend mini-festival in Dundee, Scotland.