The emergency services were called to Crayford Way at 4.45pm today (June 6).
An air ambulance also attended before flying to King’s College Hospital.
Crayford Way remains closed.
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A Metropolitan Police spokesperson said: “Police are currently on scene of a collision on Crayford Way, Crayford.
“Officers were called by the London Ambulance Service at 16:45hrs on Friday, 6 June following reports of a collision involving a car and a pedestrian.
“The pedestrian, a teenage boy has been taken to hospital with serious injuries.
“A closure remains in place at the location.”
The London Ambulance Service has also been contacted for information.
