18-year-old Ariel Winter just attended her high school prom, so things like school dress codes have played an important part in her life recently. On Thursday, the Modern Family actor instagrammed a picture of a printed sign taped to a door. It doesn't appear that she made the sign, just snapped it and posted it, but still, the message speaks volumes. Winter included a bunch of high-five emojis in the caption field, which is how teens show their support and enthusiasm for stuff.


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