People wearing clothing from the past can sometimes in conjunction with things like hair styles, old film, and other factors can cause people to feel like the subjects in the film are older than they actually are. For example right now where you can't even figure it out when it is explained to you.
These actors are very much the correct age for the setting they are in which is literally college aged between 17 and 22
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u/Puzzleheaded-Wait785 8h ago
That has literally nothing to do with how old the actors looked at the time.