Teen queen Miley Cyrus has been described as 'tarty' by fashion guru Tim Gunn.

Fashion guru and reality television star Tim Gunn has given Disney teen star Miley Cyrus the thumbs down when it comes to style.

Gunn, a judge on hit show Project Runway, slammed Cyrus' fashion style as "tarty".

"(Miley Cyrus) is just a little too tarty, forgive me. 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," Gunn told OK! magazine.

The fashion mentor, who also has his own show Tim Gunn’s Guide to Style, had the opposite advice for actress Katie Holmes, who has transformed her look in recent months with a short haircut.

"She went from looking like a little farm girl to looking like royalty," Gunn said.

"Now she needs to push back a little so she doesn’t look too dowdy or old."