The Wonderfall Quartet was formed in Athens by vocalist Irini Konstantinidi and drummer Thanos Hatzianagnostou and with the addition of bassit Haris Mermigas and pianist Dimitris Theocharis they released their debut in 2001.

The quartet's second album "Horizon" was released in 2014, with Ntinos Manos on bass and Yiannis Papadopoulos on piano.