Constantine was just one year old when Fascist Italy and Nazi Germany invaded Greece, and he spent the next four years in exile in Egypt and Cape Town, South Africa (where his sister Irene was born) with his family.
Ia berumur satu tahun ketika Fasis Italia dan Nazi Jerman menginvasi Yunani, dan ia menjalani empat tahun berikutnya dalam pengasingan di Mesir dan Cape Town di Afrika Selatan, (dimana saudarinya Irene lahir), dengan keluarganya.