Police are appealing for public assistance to help locate missing teenager Achol Adut.
The 15-year-old was last seen in St Albans about midday on 15 August.
She is described as 165cm tall with dark brown eyes and black curly hair.
Achol is known to frequent the Melton and Sunshine areas.
Investigators have released an image of Achol in the hope someone recognises her and can provide information regarding her current whereabouts.
Anyone who sees Achol is urged to call Keilor Downs Police Station on 9365 3333.