Alexia Boulton-Miller was last seen in the St Peter’s area of Broadstairs on the evening of Wednesday 10 April 2024. It is thought she has since travelled to the Rainham or Chatham area.
The 15-year-old is described as around 5ft, 5ins tall, with long brown hair with blonde highlights and brown eyes.
The CCTV image shows her wearing a distinctive black or brown and white coat, which officers hope may help someone recognise her. She was also wearing white Nike trainers with a red tick.
Anyone who has seen her or knows of her whereabouts is urged to call 999, quoting 11-0198.