'Teen Mom' star Ryan Edwards is in a familiar spot -- back behind bars for alleged drug possession.
Ryan was arrested Monday in Hamilton County, Tennessee on an active warrant from a previous drug case. According to jail records, the charge is possession of a controlled substance, and no bail has been set.
This is the second arrest this year for the 'Teen Mom' dad. As we reported ... he was arrested in March on a warrant for violating probation.
Ryan's 21-year-old wife, Mackenzie Standifer, recently announced she was pregnant with their kid. He already has another child with Maci Bookout.