Anna Nicole Smith's lawyer-turned-boyfriend and two doctors pleaded not guilty Wednesday to charges they conspired to provide thousands of prescription pills to the former model before her overdose death two years ago.

The appearance of Howard K. Stern and Drs. Khristine Eroshevich and Sandeep Kapoor in Superior Court set the stage for a preliminary hearing that all parties said could last at least two weeks.

Deputy District Attorney Renee Rose said there are 1,400 pages of discovery in the case, which was investigated for two years before charges were filed. Court Commissioner Kristi Lousteau ordered documents in the case sealed, although attorneys said that about a quarter of the material has already been made public.

The hearing was brief and Smith's name was never mentioned.

Stern, Eroshevich and Kapoor stood before Lousteau with their lawyers. The defendants said "yes" when she asked if they were pleading not guilty and when they agreed to delay the matter until June 8 for setting of the preliminary hearing date. They declined to comment outside court.

Stern's lawyer, Steve Sadow, said he wanted the preliminary hearing to begin as soon as possible.