Charley's Aunt (1941)

Charley's Aunt began life in 1892 as a British stage play, and has been performed in one form or another basically ever since. At least eleven film versions have been produced around the world. So, given the long-term popularity of this one, I won't bother going into the plot here.
The long and short of it is Oxford University undergraduate Lord Fancourt Babberley is conned into wearing a dress and impersonating fellow student Charley Wykeham's aunt, Donna Lucia d'Alvadorez, a rich widow from Brazil, in order to act as chaperone for two girlfriends. Things get more and more complicated from there, with two different fathers competing for the fake aunt and her money, etc.
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The first few scenes almost made me not watch the rest of it. Jack trying to sound English was, well… sad. Sure enough, after doing a little reading about the original play, I found out that those very scenes were in fact different than the original story, and thankfully things picked up a bit once Jack Benny put on the dress… and that fake accent seemed to fall by the wayside as well!

If you pay attention, you can almost imagine which scenes could be the beginning and end of on-stage acts, just by the amount of time spent on one set.
Get past the beginning, and you end up with a fun little movie with some good sight gags.
If you would like to watch Charley's Aunt on DVD, the UPC is 024543586173 (20th Century Fox)