A 15-year-old girl has crashed a four-wheel-drive into a KFC restaurant in Perth's north-eastern suburbs.

The Mitsubishi Pajero smashed through a wall of the fast food restaurant around five thirty on Tuesday afternoon.

The KFC is attached to a BP service station on Walter Road West in Morley, and 9 News Perth reporter Michael Stamp said the teenager was enjoying a meal with her family inside when she asked her mother for the car keys to get something inside the vehicle.

She then turned it on and revved the engine to get her mother's attention.

The car then accelerated forward, crashing through the KFC's wall. The teenager has been taken to hospital for a check up, and no other injuries have been reported.

The KFC's dining area is closed, though witnesses said the KFC's drive through window is still open.