Mammone, 50, was slapped with the charge after becoming involved in a fight with his ex-partner's father, Gregory Molineaux, who he pushed into an open door during an altercation over a bottle of vodka in Sydney, Australia in November (15).

He appeared in Burwood Local Court on Monday (25Jan16), when he pleaded guilty to the assault, and provided a letter of support from Crowe, who pleaded for leniency for his longtime pal to prevent future travel issues which could negatively impact his career.

The character reference read: "Robert is not a perfect person, none of us humans are and I'm very sure he deeply regrets the situation he finds himself in.

"I have known Robert Mammone since 1989 when we worked on a project together called The Crossing. Since then, we have worked on two other projects, Heaven's Burning in 1996, and most recently, as the director of The Water Diviner, I cast Robert as a Greek Evzone military officer."

He continued, "He needs to be able to travel at a moment's notice if an opportunity arises, as exemplified by The Water Diviner, where he was required to travel to Turkey to complete his sequences."

Magistrate Jacqueline Trad agreed the incident had been "out of character" for Mammone, and decided not to record a conviction and instead place him on a two-year good behavior bond, reports The Sydney Daily Telegraph.

Mammone, who played notorious convicted drug trafficker Tony Mokbel in hit Australian crime series Underbelly, has also featured in soap operas Neighbours and Home and Away, and films like The Condemned and The Matrix sequels.