Nope, that's not Chloë Moretz's super-tall boyfriend — it's her 6-foot-4 brother Trevor!

The 17-year-old starlet was recently spotted out and about with her big bro, who completely towers over his 5-foot-5 little sis.

Fun fact: he's one of her four brothers!

Another fun fact: The 27-year-old producer is her acting coach and the reason she became an actress. The family moved from Georgia to NYC in 2002 after he was accepted into the Professional Performing Arts School.

Take a look at several other stars who look nothing like their siblings!