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
The biggest ever airlift of rescued lions, including Zeus and Shakira, will take place on Friday - involving 33 of the big cats.
British Summer Time may have begun weeks ago, but commuters in northern England and Scotland woke up on Friday to yellow warnings of snow.
Protests in California caused chaos in the streets outside a Donald Trump rally.