Mel Ferrer as El Greco (Domenico Teotocopulo)

Rosanna Schiaffino as Jeronima de las Cuevas

Adolfo Celi as Don Miguel de las Cuevas

Fernando Rey as Re Filippo II

Mario Feliciani as Nino de Guevara

Franco Giacobini as Francisco

Renzo Giovampietro as Frate Felix

Ángel Aranda as Don Luis

Nino Crisman as Don Diego di Castiglia

Gabriella Giorgelli as Maria

Giulio Donnini as Pignatelli

Rafael Rivelles as

John Karlsen as

John Francis Lane as

Rossana Martini as Zaida

Maria Marchi as

Franco Fantasia as

Andrea Bosic as L'accusatore

Bruno Scipioni as

Rosi Di Pietro as Isabel

Mary Di Pietro as

Víctor Israel as

Giulio Farnese as Maestro d'armi

Santiago Ontañón as Leoni

Franco Mariotti as Nobile spagnolo