Police are growing increasingly concerned for the welfare of missing Veronica Sbircea and are urging her to make contact.
Veronica, 15, left her home in Kettering on the evening of Thursday, July 21.
She was last seen in Ponders End, Enfield, last Wednesday (July 27) and officers believe she may now be in Birmingham.
Veronica is white, 5ft, with long straight black hair and brown eyes.
She was last seen wearing dark leggings and a black top, as seen in this CCTV image.
She is originally from the London area and may have possibly travelled back there.
Officers are urging Veronica, or anyone who may know of her whereabouts, to contact Northamptonshire Police on 101.