Two kids go visit their "grandparents" who are acting weird. In the end it turns out they're aliens or something.

The parents sent the kids and at one point they're skyping or something with their parents and a picture of the grandparents is seen by the parents and the parents (the mom) says those are not your grandparents.

Came out maybe a few years ago

I know it.

This movie scared you, mate?

Sounds like you’re speaking of «The Visit» - but the alien-part you’re describing makes me think you’re not remembering it correctly; or describing a very similar movie.

Aww why you ruin it. Also they are mental patients not aliens.

I saw it years ago so yeah. Not scary no, just creepy. Thx 4 info

Home Alone 2: Lost in New York

Spoiler alert? Grandparents are aliens? Now I dont need to watch it.

no they arent aliens

the visit

its on netflix good flick. m knight shaymalan redeemed himself with that one imo

Animated little red riding hood