Police are worried about Sadie Hael who's been missing from Radstock for four days.
The 15-year-old has not been seen since Sunday 17 June.
She is described as having brown hair with faint purple streaks and an undercut where the back of her head is shaved.
Sadie was last seen wearing a grey tracksuit with pink lines down the legs.
Avon and Somerset Police say if you see Sadie call 101 and provide the call handler with the reference 5218132678.