How to Kill 400 Duponts (Italian: Arrriva Dorellik) is a 1967 Italian comedy film directed by Steno. The main character of the film, Dorellik, is a parody of the comic series Diabolik. The character was created in the late 60s for several sketches on television.^[2][3]

Dorellik, an Italian contract killer who lives on the French Riviera accepts a job to kill everyone named Dupont in France for a rich customer who expects to receive a large inheritance.

• Johnny Dorelli as Dorellik
• Margaret Lee as Baby Eva
• Alfred Adam as Inspector Saval
• Terry-Thomas as Police Commissioner Green
• Riccardo Garrone as Vladimiro Dupont
• Rossella Como as Barbara Leduc
• Didi Perego as Gisele Dupont
• Agata Flori as Carlotta
• Piero Gerlini as Raphael Dupont
• Totò Mignone as Berthold Dupont
• Samson Burke as Last Dupont

How to Kill 400 Duponts was a film starring popular singer and television host Johnny Dorelli.^[4] The Italian title Arriva Dorellik made reference to Dorelli's character Dorellik, which premiered on his television show Johnny Sera.^[4]

How to Kill 400 Duponts was released in Italy in 1967.^[1] Producer Dino De Laurentiis had been producing a film based on the Diabolik fumetti neri series and sued the producers of How to Kill 400 Duponts over their original title Dorellik, which led to the film being re-titled Arriva Dorellik (lit. Here Comes Dorellik) just before the film's release.^[4] Terry-Thomas, who played a starring role in Arriva Dorellik, also ended up guest-starring in De Laurentiis' Danger: Diabolik.

• List of Italian films of 1967
• Terry-Thomas on screen, radio, stage and record