under someone's spell

Idioms  

1. Fascinated or influenced by someone, as in I think he has our daughter under his spell. This idiom derives from the literal meaning of spell, “a word or formula that has magical power.” [Mid-1800s]

---

Example Sentences

There’s a theme of being haunted—by people, by memories—and of being under someone’s spell.

From The New Yorker • Sep. 17, 2015