She's barely been famous for a week ... but "Big Rich Atlanta" star Ashlee Wilson-Hawn is already in the middle of a naked photo scandal ... TMZ has learned.

Ashlee -- a former Miss Georgia Teen -- is warning media outlets that topless photos of her that are being shopped were NOT released with her permission ... and she's threatening to SUE anyone who publishes them.

We're told the pics were taken during a recent modeling shoot -- and feature a topless Ashlee doing that whole "I'm covering my boobs with my hands so you can't see my nipples" pose.

But Ashlee's rep tells TMZ ... the shoot in question was NOT meant to be a topless thing ... and if anyone has shots of her bare breasts, they were certainly ill-gotten.

The rep explains, "In the process of photo shoots, there is always the possibility of someone capturing photos that they shouldn't be taking as all models are seen in various states of dress during such events."

She continues, "Ashlee has never posed nude for a photo shoot and anyone that releases unlicensed and uncensored photos will definitely be sued."

And now ... here's Ash with her clothes on.