Ladies Who Do is a 1963 British comedy film directed by C. M. Pennington-Richards and starring Peggy Mount, Robert Morley and Harry H.

It is whilst doing her office cleaning that she retrieves a cigar discarded by financier James Ryder as a gift for the Colonel, wrapping it in a scrap of paper.

Determined to foil Ryder's plan, she recruits three of her friends and neighbours in Pitt Street, fellow 'chars' who clean the offices of other noted financiers, to gather information.

[4] Monthly Film Bulletin wrote: "Unusually slow in getting started, this back-street and big-business farce is only intermittently amusing, and then only mildly.

A basically promising idea is not exploited to good comedy advantage until the last twenty minutes or so, when the film boils into acceptable farce.

The 'ladies' of the title are dominated by Peggy Mount and Miriam Karlin; Avril Elgar and Dandy Nichols are relegated to subsidiary roles in which they can shine only at moments.

In the sixth of her ten pictures, she's joined by those other sitcom stalwarts Miriam Karlin and Dandy Nichols, as a trio of charladies who make a killing on the stock market through the tips they find among the office rubbish.