Best comedy movie mistakes of 1958
Visible crew/equipment: When Isabel Jeans is telephoned by Madame Alvarez and told that Gigi has refused Gaston's advances, she gets out of bed and walks across the bedroom. As she passes a cheval (full length) mirror a pair of retreating jean-clad legs and a hand feeding out cable can be seen in the reflection.
Factual error: The film is set during WW2, but when Pitkin drops Judy off at the station, the locomotive bears the lion and wheel emblem of 'British Railways', which was formed in 1948. Likewise the wagons in the railway yard are to a British Railways standard design and are out of period for WW2.