Rolf Harris is to be prosecuted over three more allegations of indecent assault, including one relating to a seven or eight-year-old girl.
Harris already faces 13 other counts after being charged on August 29.
The Crown Prosecution Service said the first new charge is one offence of indecent assault of a 19-year-old girl in 1984 - the same complainant as six of the existing charges.
The other new charges are one offence of indecent assault of a girl aged seven or eight, in 1968 or 1969, and one offence of indecent assault of a girl aged 14, in 1975.
Harris, 83, will next appear at London's Southwark Crown Court for a plea and case management hearing on January 14.
His trial is scheduled to begin on April 30.
The 13 original charges against the Australian-born artist, musician and TV presenter relate to nine allegations of indecent assault and four of making indecent images of a child.
Harris was arrested by officers working on Operation Yewtree, the national investigation launched after abuse claims were made against Jimmy Savile, but the allegations against him have no connection to Savile.
He is currently on bail on the conditions that he does not contact prosecution witnesses, lives at his home address and does not spend time with anyone under 18 without being accompanied by someone over 21.
Harris, who has lived in Bray in Berkshire for more than 50 years, has been in the public eye for decades.
Animal Hospital, Rolf Harris' Cartoon Time and Rolf's Cartoon Club are among the TV shows he has appeared in. He has also had several musical hits.
He painted a portrait of the Queen in 2005 and performed at her Diamond Jubilee concert last year.
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