Police are appealing for public assistance to help locate missing Mickleham teenager Niahana.
The 17-year-old was last seen at her home address about 11.30am on 9 January.
Police and family have concerns for Niahana as her disappearance is out of character.
Investigators have released an image of Niahana in the hope someone recognises her and can provide information regarding her current whereabouts.
Anyone who sees Niahana is urged to call Craigieburn Police Station on 9303 4404.