Old Mother Riley, Headmistress is a low-budget black-and-white 1950 British comedy film directed by John Harlow and starring Arthur Lucan and Kitty McShane.

Mother Riley soon establishes herself as headmistress at St. Mildred's School for Young Ladies, and throws herself into her new role with vigour, whether it is taking P.E.

[2][3] Kine Weekly wrote: "The picture is somewhat loosely put together, but The Luton Girls' Choir, aided and abetted by lightly-clad PT exponents, effectually punctuates its laughs and strengthens both its entertainment and its billing.

"[6] Anthony Nield wrote in The Digital Fix, "whilst the idea of Old Mother Riley owning her own girls' school should provide plenty of comic mileage, we're still faced with some pointless musical numbers to pad things out...(but) there's a chirpiness and a punch in the screenplay which is hard not to enjoy.

Of course, any level of sophistication is kept at a bare minimum (Lucan was never the subtlest of actors; he performed for the camera just as he did on the stage), but in its own way …Headmistress has an energy equal to that of, say, Hellzapoppin' or the Marx Brothers A Night in Casablanca, even if both are far superior and much funnier.