A 25-year-old man died after being struck down by a car just after midnight on Sunday.
The man from Acton, was walking near Gypsy Corner, when the blue Nissan Sunny, travelling east on the A40 Western Avenue collided with him.
He was taken to the Royal London Hospital where he died from his injuries a few hours later.
Police are now appealing for witnesses and anyone with information should contact the Alperton Collision Investigation Unit on 020 8998 5319.
Next of kin have been informed and a post mortem will be scheduled in due course.