Chaostar is a classical, opera and vocal orchestra from Greece started in 1998, composed of Christos Antoniou, Spiros Antoniou, Sotiris Vayenas, Nathalie Rassoulis, and Sapfo Stavridou. Several of the members are also members of Septic Flesh. They have released four albums on Holy Records, a label with notable artists such as Elend, Orphaned Land, and Septic Flesh.