Michael Alan Quartermaine is a fictional character on the ABC soap opera, General Hospital. He is the son of the late, A.J. Quartermaine and his ex-wife, Carly Corinthos, and the adoptive son of mob boss, Sonny Corinthos. He is also the product of a one night stand between two people who hated each other. He was born onscreen on December 29, 1997. He was named after Michael "Sonny" Corinthos Jr., the man who would end up being his adoptive father. Dylan Cash portrayed the character as a child from 2002 to 2008. He was also de-aged in 2014 and then aged again in 2015.