Mary Tyler Moore was known for her warm, wholesome, sincere smiles. However, in this 1971 image of Ms. Moore, the beloved actor was captured in a very deliberate deviation from that stereotype.
This is an example of a very specific sub-type of a "Social Smile". By definition, social smiles are not sincere - yet they are not necessarily always unwanted.
Note Mary's mouth is asymmetrical - with the right side elevated.
Mary's left eyebrow is also elevated slightly - a difference which is amplified by the partial covering of her right eyebrow with her hair.
Although we cannot see her arms fully, her right arm is held in akimbo - away from her torso (and by the angle of her right arm, this is probably a fingers-forward akimbo [more alpha]). Her hands are most likely semi-clasping on her right hip/lower torso. This is a relative alpha, action-oriented and assertive upper extremity configuration.
Summary: Taken in toto (and particularly given Mary's facial expression) - this body language cluster projects a strong, flirtatious, sexy, "I'm-in-charge", alpha female set of nonverbal signals.
Thank you Mary Tyler Moore. You are missed.
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