Police are asking for the public's help in finding an Oshawa teen who has been missing since Dec. 9.

Autumn Calderon, 15, was living at a group home in Oshawa but hasn't been seen for weeks. Her family is concerned for her well-being.

According to police, Calderon has run away before, but never for this long. The teen reportedly has family and friends in Hamilton — but repeated efforts to locate her have been unsuccessful.

Calderon is described as five foot five inches tall, around 104 pounds with a thin build, brown eyes and long brown hair.

Anyone with information regarding her location is asked to contact police.

Anonymous tips can be made to Crime Stoppers at 1-800-222-8477. Tipsters are eligible for a cash reward of up to $2,000.