The trial of Mr. Weinstein, the disgraced Hollywood producer, is one of the most anticipated proceedings in recent years. Allegations against him helped ignite the global #MeToo movement, a reckoning over sexual assault and harassment by powerful and influential men in the workplace.

Mr. Weinstein, 67, is charged with raping one woman in a Manhattan hotel room in 2013 and forcing oral sex on a second woman in his Manhattan apartment in 2006. He is also charged with predatory sexual assault, which exposes Mr. Weinstein to a lifetime prison sentence.

Four other women will be called to testify about their allegations that Mr. Weinstein sexually assaulted them. Those incidents are too old to be charged as separate crimes, but prosecutors have won permission to bring them up in an effort to prove a pattern of behavior.

Mr. Weinstein has said that all the encounters were consensual.

Jury selection has been full of drama since it began last week. Hundreds of panelists immediately said they could not be fair and were dismissed. A flash mob protested Mr. Weinstein outside the courthouse. The supermodel Gigi Hadid popped up in the jury pool and was eventually excused.

One potential juror was dismissed after she said that she knew a woman who once had “an encounter” with the producer. The judge threatened to hold another prospective juror in contempt of the court after he had asked his nearly 7,000 social media followers how he might use a high-profile case to promote a new novel.

Despite what Mr. Weinstein has called in court papers a “carnival-like atmosphere,” the jury and three alternates were chosen by 1 p.m. on Friday. The alternate jurors, who will serve only if one of the first 12 jurors must withdraw, include a white man, a Hispanic woman and black woman.