Adult film star Ron Jeremy has been charged with a further 20 counts of sexual assault involving 13 women from 2004 to January this year, prosecutors have said.

The 67-year-old was charged with raping three women and sexually assaulting another in June and has been held in jail on $6.6m (£4.86m) bail since.

New charges were announced on Monday, including six counts of sexual battery by restraint, five counts of rape and lewd conduct with a 15-year-old girl.

The new charges against the highly successful actor, whose full name is Ron Jeremy Hyatt, span over 16 years and the alleged victims range from 15 to 54-years-old, prosecutors said.

They said the teenager was allegedly attacked at a house party in Santa Clarita, a city 33 miles north of Los Angeles.

The latest incident occurred on New Year’s Day this year when he is said to have sexually assaulted a 21-year-old woman outside a business in Hollywood, prosecutors allege.

Six other alleged assaults happened inside a West Hollywood bar the actor frequented, while another was in the bar’s car park, prosecutors claim.

If convicted of the charges, Jeremy faces a possible maximum sentence of more than 250 years to life in state prison.

When the initial charges were filed in June, the Los Angeles County Sheriff’s Department urged more alleged victims to come forward.

Nicknamed “The Hedgehog”, Jeremy is one of the porn industry’s most high-profile figures, appearing in more than 2,000 films since he started in the 1970s.

In June, he denied the allegations in a tweet which said: “I am innocent of all charges. I can’t wait to prove my innocence in court! Thank you to everyone for all the support.”