Teen sensation Miley Cyrus has come under fire from Heidi Klum's fashion guru Tim Gunn for dressing too old for her age.

The Project Runway host has hit out at the 15-year-old Disney star, insisting she dresses "too tarty" for teen audiences.

Gunn tells U.S. magazine Ok!, "Forgive me. She's just a little too tart. I don't want her to look like she's going into a convent school. But it's just a little too much for a 15-year-old. If I didn't know better, I'd swear she was 25."