Athanasios Demetrios Maroulis (born September 22, 1964) is an actor, vocalist and record producer born in Brooklyn, New York. He is the older brother of singer Constantine Maroulis. Athan Maroulis formed the New York based group Fahrenheit 451 (1984–1986), with whom he recorded his first commercially available album. Over the ensuing years, Maroulis established himself in a number of alternative musical genres including gothic, industrial and electronic. Stints with the Philadelphia based Executive Slacks (1987–1990), as well as Tubalcain (1991–1993), followed.

After moving to Los Angeles he fronted Spahn Ranch (band) (1993–2000). A diverse and fairly eclectic vocalist, Maroulis recorded a number of albums with a 1940s styled vocal/jazz combo named The Blue Dahlia (1999–2000). Maroulis continues to remain active both behind and in front of the scenes, runs Sepiatone Records, a vintage vocal and jazz record label while continuing to lend his voice to various studio and film projects.