Students at a Chicago high school got quite a surprise on Monday when Bella Thorne and Patrick Schwarzenegger showed up unexpectedly.

!instagram-embed(https://www.instagram.com/p/Bf9ROb3B-SN/)

The duo is out and about promoting their new movie, “Midnight Sun,” about a teenage girl who can’t go out in the sunlight.

Knowing their target audience, Thorne and Schwarzenegger went straight to the source to whip up buzz for their new flick … teens.

!instagram-embed(https://www.instagram.com/p/Bf9jdbvB5LP/)

Students from Nicholas Senn High School in Chicago, Illinois went wild for the stars. They snapped pics and took selfie videos with the actors and even got some signed swag.