Stelios Diamantis was born in Athens on March 2, 1963. He grew up in Kallithea, Attica. Child of a large family, his father was a private employee and his mother a housewife. He studied Economics at the University of Piraeus. He works as a Sales Manager in a company active in the clothing sector. Founder of the Culture Club "Friends of Mikis Theodorakis AXION ESTI". Co-founder of the online television station "AXION ESTI TV" which aims to promote culture. He is married to Maria Georgitsopoulou with whom they have two children.