When Jennifer Lawrence walked the red carpet at the Rome Film Festival this week, she did so while wearing a two-toned V-neck sweater and a lightweight tiered white skirt. Her cozy knit pullover was weather-appropriate for a fall October evening, but formal wear puritans might question whether it was red carpet-appropriate.

Sweaters are not often associated with glamorous event arrivals, at least not in recent memory. For the last 15 or so years, celebrities have been, in general, more trussed up, as red carpets have become a heightened economic prospective for stars and designers alike. These days, it’s not unusual for an ornate gown to come with a sculptural headpiece , or be completed by a train that reaches beyond several meters. Earlier this year the Cannes Film Festival organizers

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