Australian entertainer Rolf Harris has been found not guilty on two counts of indecent assault and one of sexual assault.

Harris was facing seven charges in a London court involving allegations made by seven women over a 33-year period from 1971.

The jury of seven women and five men, who had been deliberating for more than 26 hours, failed to reach verdicts on the remaining four counts.

Judge Alistair McCreath dismissed the jury. The prosecution now has to decide whether to pursue another trial on the undecided counts.

The unresolved counts relate to allegations that Harris indecently assaulted four teenage girls on separate occasions at public events between 1971 and 2002.

Harris family lawyer Daniel Berke speaks outside Southwark Crown Court. ( ABC News: Emily Bryan )

The charges on which he has been found not guilty include the alleged indecent assaults of a blind and disabled woman, and a 13-year-old girl who asked for his autograph at a radio station.

Both incidents were alleged to have occurred in the late 1970s.

Speaking outside the Southwark Crown Court, Harris' family solicitor Daniel Berke thanked the jury.

"Mr Harris is grateful for the care and attention this jury has given to his case and for the not guilty verdicts returned," Mr Berke said.

"Given the uncertainty as to what will now happen no further comment can be made."

Harris was also found not guilty of sexually assaulting a 42-year-old woman who alleged the entertainer grabbed her breasts at a party in 2004.

Harris let out a sigh after the second "not guilty" verdict was read out. He has pleaded not guilty to all charges.

He waved to his supporters when he left, one of whom was in tears after hearing the decision.

The 86-year-old will return to Stafford Prison where he is serving a sentence of five years and nine months for previous convictions of indecent assault.