UPDATE: On 7 April 2020, the High Court overturned Cardinal George Pell's conviction for historic child sex offences and acquitted him of the charges. The High Court unanimously found Victoria's Court of Appeal should not have upheld Pell's conviction and that the evidence could not support a guilty verdict.

A man who alleges he was molested by George Pell when he was a boy in the 1970s will file a lawsuit against the disgraced cardinal in the Melbourne’s Supreme Court.

The suit to be lodged today names Pell, the trustees of Nazareth House, (formerly St Joseph's), the State of Victoria and the Catholic Archdiocese of Melbourne.

The 50-year-old man was a resident in St Joseph's Boys Home in Ballarat from February 1974 to 1978 and alleges he was abused by Pell during that period.

Cardinal George Pell arrives at the County Court in Melbourne, Tuesday, February 26, 2019. Cardinal Pell, once the third most powerful man in the Vatican and Australia?s most senior Catholic, has been found guilty of child sexual abuse after a trial in Melbourne. (AAP Image/Erik Anderson) NO ARCHIVING (AAP)

He was a complainant against Pell in a second trial over allegations Pell indecently assaulted boys in Ballarat in the 1970s.

The case was abandoned by prosecutors after a court deemed vital evidence inadmissible, with the man stating he was left devastated by the decision.

A Melbourne jury in December found Pell guilty of five charges of abuse against two choirboys in the 1990s but the verdict was only made public on February 26 after months of procedural secrecy and the abandonment of the second trial.

Pell has denied all allegations levelled against him and is appealing his conviction.

More to come.