Sisters Guilia and Daniela Nicoletti have been identified as two of the four teens involved in the tragic accident that took place near Cochrane early Thursday morning.
Sixteen-year-old Daniela died at the scene, while 17-year-old Giulia remains in critical condition at the Foothills Hospital.
Four teenage girls were in the BMW X5 SUV that swerved off the road and crashed into a fence before landing on a rural property.
Two teenagers have died while the other two remain in critical life-threatening condition.
STARS air ambulance was used to transport one of the victims to hospital, the 17-year old remains in a coma at the Foothills.
It's been confirmed that all four vehicle occupants attended Springbank Community High School.