Police are appealing for public assistance to help locate missing teenager Sheanna.
The 13-year-old girl was last seen at a residence in Montrose at about 12am on Sunday 10 August.
Police and family have concerns for her welfare.
Sheanna is believed to be travelling with a man known to her in a silver Ford Falcon sedan with registration UWV 531.
It is understood the pair may have travelled to the Echuca area and possibly crossed the border into New South Wales.
Sheanna is Caucasian, about 160cm tall with a slim build and long, straight, light brown and blonde hair.
She was last seen wearing black pants and a hooded jumper, but is believed to have several changes of clothes in her possession.
Police have released an image of Sheanna in the hope someone recognises her and can provide information on her whereabouts.
Anyone who sees the teenager is urged to contact Triple-Zero (000).
Those with information that could assist police in determining her whereabouts should call the Boroondara Police Station on (03) 8851 1111.