Lindsay Lohan is due in court Wednesday afternoon, where the Los Angeles District Attorney's office plans to file a felony count of grand theft against the Mean Girls actress, a D.A. spokesperson tells TVGuide.com.
The charge springs from an allegation that Lohan, 24, stole a $2,500 necklace from a Venice, Calif., store on Jan. 22, nearly three weeks after she was released from court-ordered rehab, stemming from a 2007 DUI case.
"We vehemently deny these allegations and, if charges are filed, we will fight them in court, not in the press," Shawn Chapman Holley, Lohan's attorney, said Saturday.
Police obtained a search warrant last week to try to retrieve the necklace from Lohan's house, but the item was turned in to detectives before the warrant could be executed.
The actress is also under investigation by Riverside County prosecutors for an alleged battery on a Betty Ford Center staffer during a December altercation.
Los Angeles Superior Court Judge Elden S. Fox told Lohan in October that she will face a mandatory 180-day jail sentence if she violates probation, which requires her to obey all laws and submit to random drug tests.
Lohan is expected to appear in court at 1:30 p.m. on Wednesday.
Lohan's lawyer did not immediately respond to TVGuide.com's request for comment.