be under (someone's) spell

To be influenced or controlled by someone because one finds him or her fascinating, enchanting, or seductive. Our son has never acted out like this before. I think he must be under his new friend's spell or something. Such was the magnitude of the duchess's beauty that countless men have been under her spell.

Common Names:

Name	Pronounced	Usage
Kallistrate	-	Ancient Greek
Coriander	KAWR-ee-an-dər	English (Rare)
Erma	UR-mə	English
Eutychius	-	Ancient Greek (Latinized)
Marceline	-	French
Allison	AL-i-sən	English