They courting couple were sitting in the vehicle on Orpen Road in the Finaghy area around 12.45 am this morning when a man approached and threatened them.
He then got into the car and sped off.
P0lice say the blue Citroen C3 was found at Glenwood Green in Poleglass a short time later.
The hijacker was described as being in his 40s, about 5ft 10 ins tall and of medium build.
He was wearing a red and white checked shirt and blue jeans.
The man and woman whose car was stolen were not injured.