On seaside holiday, Nero, Poppea, Seneca and their friends and family prepare a great show where Nero will star. When his mother Agrippina arrives with her German praetorians and decides Nero has to conquer Britain, she's asking for trouble. Many attempts of murder and poisoning will happen on the eve of his great show.
| Actor | Role |
|---|---|
 Alberto SordiNero | Nero |
 Vittorio De SicaSeneca | Seneca |
 Brigitte BardotPoppea | Poppea |
 Gloria SwansonAgrippina | Agrippina |
 Ciccio BarbiAncieto | Ancieto |
 Giorgia MollLidia | Lidia |
 Memmo CarotenutoCreperio | Creperio |
 Mino DoroCorbulone | Corbulone |
 Enzo FurlaiSegimanio | Segimanio |
 Agnese DubbiniUgolilla | Ugolilla |
| IIrene GayNot listed | Not listed |
 Amalia PellegriniAcceronia | Acceronia |
 Mimmo PoliThe Builder of the Theater | The Builder of the Theater |
 Barbara ShelleyA Guest at the Villa | A Guest at the Villa |
| GGiulio CalìThe Carpenter | The Carpenter |
 Nino VingelliAnother Carpenter | Another Carpenter |
 Sandra MiloNot listed | Not listed |
 Sonia MoserNot listed | Not listed |
 María Luisa RolandoNot listed | Not listed |
 Rina De LiguoroNot listed | Not listed |
 Renato TerraNot listed | Not listed |
 Arturo BragagliaA Senior Senator | A Senior Senator |
| EEuro TeodoriNot listed | Not listed |
 Mario MazzaTacito | Tacito |