Police are appealing for the whereabouts of Lucy Mullen from the Marylebone area.
The 42-year-old was last seen in Warren Street on Friday, 25 July, and has not been seen since.
She is white, around 5ft 7ins tall of medium build with long shoulder-length dark brown hair.
She was last seen wearing light blue tight jeans, dark blue Lonsdale t-shirt and possibly a blue body-warmer/gilet with a furry hood.
Anyone with information on her whereabouts is asked to call Camden police on the police non-emergency line on 101 quoting 14MIS026975