The veteran entertainer, aged 84, rested his hands on a wooden bench and listened intently as a clerk listed the 12 charges for the first time before a jury.
Justice Nigel Sweeney subsequently told the six men and six women of the jury that they would learn a lot more about the case today.
That's when prosecutor Sasha Wass QC delivers her opening address at Southwark Crown Court.
Harris, dressed in a light blue suit, striped pink shirt and red tie, used a hearing loop as the charges were read out.
The first count dates back to the late 1960s, when it's alleged Harris indecently touched a girl aged seven or eight.
The court heard in 1975 Harris assaulted another victim aged 14 "by rubbing her buttocks".
Another victim was aged between 12 and 15 in the late 1970s and early 1980s when Harris allegedly touched her indecently.
In 1984, when the complainant was 19, it's alleged Harris indecently assaulted her.
The final victim was aged 14 when she was allegedly indecently assaulted in May 1986.
Harris has pleaded not guilty to all 12 counts.
Justice Sweeney explained to the jury members their job was to eventually reach true verdicts.
"It is your duty to try the case on the evidence you hear in the courtroom and nowhere else," he said.
The judge said they shouldn't be influenced by external matters, including any media reports.
Earlier, Harris arrived at court again accompanied by his wife, Alwen, daughter Bindi, and niece Jenny.
They were protected by private security guards.
Asked how he was feeling on his way into the building Harris told AAP: "Good."
The trial, which is expected to run until late June, continues.
