A Ford Laser driven by a 17-year-old girl from Manjimup and carrying four young female passengers was on the southbound lane when it collided head on into a white Subaru Forrester driven by an 84-year-old man.

The girls were travelling home from the Bunbury campus of the 8000-student South West Regional College of TAFE when the accident happened.

The aunt of one of two teenage girls killed in a horrific head-on crash in WA's South-West while on her way home from TAFE says her 16-year-old niece was a "beautiful girl" who was "committed to her goals and dreams".

"She was a very athletic girl who was committed to her sport, her goals and her dreams. She was taken too young.”

TAFE director of education and training Tom Morris has issued a memo to college staff informing them of the tragedy and offering words of support for the families.

"It is tragic when young lives and students in the process of pursuing their career dreams, and with such potential, are tragically cut short," Mr Morris told WAtoday.com.au.

He said college managing director Wendy Burns was in the process of contacting the girls' families.

Tragic collision

The two cars were travelling in opposite directions on South Western Highway when they collided just after 4pm yesterday, about 6km north of Boyanup between Bunbury and Donnybrook.

The Laser being driven by a 17-year-old Manjimup girl, and carrying Rebecca and three other teenage girls, was in the southbound lane when it smashed head-on into the white Subaru Forester.

Police spokesman Greg Lambert said the Manjimup driver and Rebecca, who was travelling in the right rear seat, were found dead at the scene.

The three other girls, aged 15, 16 and 17 suffered a range of broken bones, the worst of which was a broken pelvis. They were taken to Bunbury Regional Hospital for treatment.

The Subaru driver sustained serious leg injuries but is in a stable condition. His 80-year-old male passenger from Kelmscott suffered minor cuts.