The Ladykillers
Director: Alexander Mackendrick
Cast: Alec Guinness, Cecil Parker, Herbert Lom, Peter Sellers, Danny Green, Jack Warner, Katie Johnson

An old and credulous English lady rents out a room to a nice gentleman, unknowing that the man and his cohorts use the space to plot a robbery. This sweet comedy has a wonderfully simple premise, warm characterisation and several lovely performances. No wonder it has become a classic. The Coen brothers made a very disappointing remake in 2004.