have (someone) under (one's) spell(redirected from having them under their spell)
have (someone) under (one's) spell
To be extremely fascinating, enchanting, or seductive to someone and have him or her under one's control or influence as a result. Our son has never acted out like this before. I think that new friend of his must have him under his spell. I would normally never rush into a relationship this quickly, but Susan has me completely under her spell. Such was the magnitude of the duchess's beauty that she has had countless men under her spell.