Police are appealing for public help to find missing 17-year-old Hayley Brittain.
Hayley was last seen on Saturday 6 October in the Springvale area.
Police say they have concerns for her welfare due to her age and the length of time she has been missing.
Hayley is described as about 163 centimetres with short dark brown hair and brown eyes.
She is known to frequent the Dandenong and Frankston areas.
Any information to Springvale police station on 8558 8600.