Anthony Quinn as Theo Tomasis

Jacqueline Bisset as Liz Cassidy

Raf Vallone as Spyros Tomasis

Edward Albert as Nico Tamasis

James Franciscus as President James Cassidy

Camilla Sparv as Simi Tomasis

Marilù Tolo as Sophia Matalas

Charles Durning as Michael Russell

Luciana Paluzzi as Paola Scotti

Robin Clarke as John Cassidy

Kathryn Leigh Scott as Nancy Cassidy

Roland Culver as Robert Keith

Tony Jay as Doctor

John Bennett as Servant

Katherine Schofield as Helena

Joan Benham as Lady Allison

Linda Thorson as Angela

Guy Deghy as Tablir

Jill Melford as Magda

Lucy Gutteridge as Mia

Zozo Sapountzaki as Taverna Dancer

Jonathan Bolt as Secret Service Agent

Joss Ackland as Naval officer (uncredited)

Carinthia West as Beautiful Guest