Police are appealing for help in finding a teenager last seen leaving a nightclub in Windsor, England.
Marnie Clayton, 18, from Bracknell, left Atik nightclub in William Street at around 2am on Sunday morning, Thames Valley Police said.
She did not return home and was reported missing by her family just before 3am.
Ms Clayton is described as a white female, approximately 5ft 2ins to 5ft 4ins tall, with brown hair and a slim build.
The teenager, who was wearing a grey dress when she was last seen, is also known to frequent Reading town centre.
Police released photographs of Ms Clayton, including one taken on the night she went missing.
Detective Chief Inspector Jon Groenen, of Thames Valley Police, said: "This is out of character for Marnie, and we are becoming increasingly concerned for her welfare.
"I would appeal to anybody who knows of Marnie's whereabouts to please call us on 101, quoting reference number 43220021633.
"I would also like to appeal directly to Marnie, if you see this appeal, please contact your family or the police to let us know you are safe and where you are."