Charles Laughton
Tiberius Claudius (archive footage)
Robert Graves
Interviewee [original author]
Josef von Sternberg
Interviewee [director] / Himself (archive footage)
Merle Oberon
Interviewee / Messalina (archive footage)
Flora Robson
Interviewee / Livia (archive footage)
Emlyn Williams
Interviewee / Caligula (archive footage)
Eileen Corbett
Interviewee [script girl]
John Armstrong
Interviewee [costume designer]
John Abbott
Himself – Ms. Robson's Host (uncredited)
Robert Newton
Cassius, Captain of Caligula's guard (archive footage; uncredited)
Basil Gill
Xenophon, Claudius' doctor (archive footage; uncredited)
