under somebody's spell

under (one's) spell

Influenced or controlled by one because they are considered fascinating, enchanting, or seductive. Our son never acted out like this before he fell under that new student's spell. Ever since I fell under Susan's spell, our relationship has progressed much more quickly than I would normally be comfortable with.
See also: spell
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

(be) under somebody’s ˈspell

(be) so attracted to or interested in somebody that you are in their power and will do what they say: When he tells a story, the children are completely under his spell.
If somebody puts a spell on you, they say a phrase with magic power that gives them control over you.
See also: spell
Farlex Partner Idioms Dictionary © Farlex 2017
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