be struck on (someone or something)
For someone or something to make a strong impression upon one. I was struck on Caitlin's poise in the interview—she's only 18, you know. Phil was struck on Alice's beauty the moment he saw her.
be ˈstruck by/on/with somebody/something
(informal) be impressed or interested by somebody/something; like somebody/something very much: I was struck by her youth and enthusiasm.We’re not very struck on that new bar.