Putting on the Charm with the Sensitive SMILE
Credits: "Frozen" is based on Hans Christian Anderson's book, "The Snow Queen." Movie produced and distributed by Disney Studios, 2013.
The sensitivity which makes the smile of Prince Hans in "Frozen" so appealing is based on the slightest upwards inflection of his inner eyebrow corners, which normally arc downwards. This movement, actually part of the Distress pattern in the brows, adds a sad or fearful inflection to the moderate smile, as though we were trying to be likable but at the same time are feeling insecure about being rejected, or being seen as too assertive.
The Sensitive Smile is surprisingly common in popular photographs of female actresses who have learned how to capitalize on a certain friendly, vulnerable appeal, and even a tiny amount of brow curl changes the whole flavor of the expression.