Ready to duck, but ...
First: I love this movie. What fun. Great costumes, excellent performances, Mancini music - fun fun fun!
But - and here's where I'm going out on a limb: Julie Andrews wasn't a perfect fit for the role. "Miscast" is overstating the case, but I'd like to have seen someone more convincingly androgynous in the role.
Every fiction requires some suspension of disbelief. Broad comedy gets greater indulgence, provided the film is funny enough to sweep the audience along with it.
In that sense, Andrews didn't need to be completely viable in the role of a male. Clearly not - she did a great job, and it was a hit.
But I'd love to have suspended a little less disbelief - that is, seen someone in that role who couldn't have been pegged from two rooms away as a woman in male drag. The whole premise would have been strengthened without someone so decidedly feminine on the screen. For me, I had to keep reminding myself that everyone on the screen was buying this, and that prevented my complete surrender to it.
Imagine if an entire plot centered on how incredibly tall the lead character was, and they decided to cast Linda Hunt. She's a helluva talent, but it taxes the whole effect for us all to pretend she's tall.
Great movie. Somewhere out there, in an alternate reality, is a version where we're just as stunned as the onscreen audience at the astounding gender fluidity of Victoria.
Okay, pile on. ;)
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Nothing to see here, move along.