“Who wouldn’t want to be in her shoes” (Dramatic Irony)
One night, out with his friends, Elio watches Oliver dance wildly with Chiara, and Marzia notes, "Who wouldn't want to be in her shoes," commenting on Oliver's desirability. The way that Guadagnino shoots Elio, the viewer can see that he too is attracted to Oliver, but none of his friends know. The viewer is privy to the fact that Elio loves Oliver, but his friends have no idea, and Oliver cannot tell either.
Elio and Oliver's affair (Dramatic Irony)
While a few shots hint at the fact that the Perlmans know about their son's attraction to Oliver, when the two men embark on their affair, it is completely secret. They share a bed and have sex, but neither tells the other about the romance they share. Thus, there is a dramatic irony between what the viewer knows about their connection and what the other characters know.
Elio's judgment of Mounier and Isaac (Situational Irony)
When Mounier and Isaac, an older gay couple, comes to visit the family, Elio is respectful of them, but also finds them silly and ridiculous. He calls them "Sonny and Cher" before they arrive, dismissing their homosexuality. This is ironic because their visit coincides with a growing affection between Elio and Oliver. Elio is embracing his own homosexual urges, yet he disparages Mounier and Isaac, who are openly gay.
The End (Dramatic Irony)
After learning that Oliver is getting married soon in a conversation over the phone, Elio pretends to be happy for his former lover. After he hangs up, however, he is completely crestfallen, and sits in front of the fireplace, staring into the flames and weeping. While Oliver has no idea what Elio's actual emotional response to the news is, we the viewer see that Oliver's engagement has left Elio heartbroken.
