Among his crew are the courtly conman Major Claude Courtney (Cecil Parker), the murderous gangster Louis Harvey (Herbert Lom), the dimwitted ex-boxer 'One-Round' Lawson (Danny Green), and the petty Cockney criminal Harry Robinson (Sellers). Unbeknownst to her, Marcus's band is actually a gang of criminals using her home to plan a bank robbery. Wilberforce (Katie Johnson) as a rehearsal space for his amateur string quartet.

In the case of 'The Ladykillers,' Guinness plays the sinister Professor Marcus, who rents some rooms from the elderly Mrs.