Stelios Kappatos was born in 1938 and grew up in Ilioupoli, Athens, originally from Dilinata, Kefalonia. He was for a long time, a key and permanent member of the State Theater of Northern Greece. His presence at the State Theater of Northern Greece was great, where he served from 1971 until his death, performing many classical roles in more than 40 plays. In 1964 he made his first professional appearance in the theater