Los Angeles ? Catherine Zeta-Jones took the stand Wednesday and read from 19 letters containing death threats written by a woman charged with stalking the Oscar-winning actress.

The letters suggested Zeta-Jones would be chopped into pieces “like Sharon Tate was,” and referred to the violent deaths of President Kennedy and Nicole Brown Simpson.

In a quavering voice, Zeta-Jones, 35, gave more than three hours of testimony at a preliminary hearing that will determine whether there is enough evidence to order defendant Dawnette Knight, 32, to trial.

“I’ve never in my life had anything or had anyone say anything to me so satanic,” said Zeta-Jones. “I can’t even imagine how a sane human being could have these images locked in their brain.”

The actress testified after her husband, actor Michael Douglas, described the couple’s ordeal and said Zeta-Jones needed medication to calm herself.

The actor testified that the first threat that he learned of was a telephone call made in March to a hotel his family owns in Bermuda. He said he did not mention the call to his wife, fearing it would “upset her tremendously.”

Knight, who apologized last month in a letter that claimed she had been infatuated with Douglas, was arrested June 3 at her Beverly Hills apartment and charged with one felony count of stalking and 24 felony counts of making criminal threats. She was held on $1 million bail.

In mid-May, while Zeta-Jones was in Amsterdam filming for “Ocean’s 12,” the operator at her hotel took three calls that were “violent … shocking to the phone operator,” the actress said.

Zeta-Jones testified she had a severe anxiety attack on her way to her home in Spain three days later. She felt faint, was sweating and shaking and had difficulty breathing, she said.

Zeta-Jones said the personal details in the letter — including her travel schedule, the names of her friends, relatives and her children’s nanny and details about a former apartment — unnerved her.