Surrey Police is asking for help in tracing teenager Sanita Muceniece who went missing Thursday 6 November.
Sanita, who is also known as Jessie, went missing at 5pm after spending the day at Thorpe Park in Chertsey.
Officers are concerned for welfare and believe she may be in the Croydon or Brixton areas.
The 16-year-old, who is from the Pulborough area is described as white, approximately 5ft 6inches tall, of slim build and having long blond hair. She also has a piercing in the left side of her bottom lip and has a self-applied tattoo of three hearts on her left wrist.
She was last seen wearing black wedge boots, black leggings, a cream coloured sparkly top, black cardigan, a short black leather jacket with fur on the hood and white metal hooped earrings and large necklace.
Anyone who may have had contact with her during the day, or knows of her whereabouts now is asked to contact Surrey Police immediately on 101 (999 in an emergency) quoting the reference number 45140093995.