Michael John McKean is older than the Biffy Clyro musician.
Simon Alexander Neil (born 31 August 1979) is a Scottish vocalist, guitarist, and songwriter. 
Michael John McKean (born October 17, 1947) is an American actor, comedian, and musician, known for a variety of roles played since the 1970s. 
Biffy Clyro are a Scottish rock band that formed in Kilmarnock, East Ayrshire, composed of Simon Neil (guitar, lead vocals), James Johnston (bass, vocals) and Ben Johnston (drums, vocals). 
