Ballarat Police are asking for help in finding a missing person.
Zac was last seen at Clayton just before midnight Friday and may have headed to the Ballarat area.
He was last seen wearing a Kathmandu jacket, grey top with black sleeves, black Everlast track pants, grey Asics runners with red stripes. He was also wearing a black lanyard with a key around neck, and a dark green bag.
Anyone with information, please contact Oakleigh Police Station on (03) 9567 8900.