In the "pretty ugly girl" trope, an attractive young woman is cast as "ugly", this being signified typically by (a) baggy clothes, (b) hair in a bun or otherwise held up over the neck, and (c) glasses. At some point in the film, the "ugly" girl will get a makeover, consisting of changing into tight clothing, taking off her glasses, and letting her hair down. Only then do people find her attractive.
I think this is a form of the Pygmalion / Cinderella myth. TV Tropes would classify it as "Beautiful All Along".
The trope appears in very pure form in the 1999 movie "She's All That".
I'm wondering what was the first appearance of the complete trope — remove glasses, let down hair, put on tighter clothing, then attractive. TV Tropes lists numerous near-matches, the earliest of which is Dorothy Malone in The Big Sleep (1946). This scene shows Bogart flirting with Malone and asking her to take off her glasses. She does, and lets down her hair, at which point he says "hello!" to indicate appreciation of how much more attractive this makes her.
Recently I noticed a pure example in the 1982 film "The Pirate Movie", in which Kristy McNichol plays an unattractive woman until she takes off her glasses, changes into tighter clothes, and lets down her hair, at which point she is 'beautiful'.
What is the earliest example of the "complete" trope?