Sean O'Hagan is an Irish musician who has been a member of Microdisney, The High Llamas and Stereolab.
O'Hagan is, alongside Cathal Coughlan, a founding member of Irish indie band Microdisney; the band initially formed in Cork but was based in London from 1982 until their split in 1988. He released the solo album High Llamas in 1990, using that as the name for the band he subsequently formed. The High Llamas released a number of highly acclaimed albums, showing influences as diverse as The Beach Boys, Ennio Morricone, Antonio Carlos Jobim and avant-garde electronica. He has also collaborated extensively with Stereolab, playing in the band until 1994 and appearing as a guest musician on later releases. In 1996 he collaborated with Tim Gane as Turn On, releasing an album of the same name on Drag City Records. They also worked together on the soundtrack to the film La Vie d'Artiste. He provided string arrangements for several Super Furry Animals albums. He guested on The Heavy Blinkers 2013 album Health.