LOS ANGELES >> A judge gave Lindsay Lohan roughly two weeks to decide if she will fight or take a plea deal in a felony grand theft case during a hearing Wednesday, but either decision could send the troubled starlet back behind bars.

Superior Court Judge Keith Schwartz told Lohan he would sentence her to jail if she accepted a plea deal involving the theft of a $2,500 necklace from an upscale jewelry store.

“If you plead in front of me, if this case is resolved in front of me, you are going to jail,” Schwartz said. “Period.”

Lohan, 24, has pleaded not guilty.

Rejecting the deal would trigger a hearing during which prosecutors would present some of their evidence to another judge. Schwartz said that judge would sentence Lohan for a probation violation if she determined Lohan should stand trial.

That could mean Lohan is sentenced to jail even before the theft case is tried.

He said he doubted Lohan would take the plea deal, which prosecutors declined to discuss after the hearing.