Max Clifford has been told he must serve at least half the eight-year sentence handed down at Southwark Crown Court in prison.
Judge Anthony Leonard told Clifford he had shown a "contemptuous attitude" and "quite extraordinary behaviour" while showing "no remorse" for his crimes.
The judge said: "These offences may have taken place a long time ago, when inappropriate and trivial sexual behaviour was more likely to be tolerated, but your offending was not trivial, but of a very serious nature."
More top news
Jeremy Corbyn has denied allegations of bullying saying "intimidation is not allowed" in the Labour party.
A gunman who killed nine people and at a Munich shopping centre was German-born and had no links with Islamic State, authorities say.
Torrential rain and flooding has killed 24 people in China and forced tens of thousands from their homes, according to state media.