Musician Nick Cave confirmed the news.
In a brief statement, he wrote: “With much sadness, I can confirm that my son, Jethro, has passed away. We would be grateful for family privacy at this time.”
Lazenby, a fashion model who lived in Australia, had recently been released from jail after being convicted of assault against his mother.
At the time of his sentencing, his lawyer announced that he had been diagnosed with schizophrenia. He was previously convicted of assault in 2018, against his then girlfriend.
Lazenby is the second of Nick Cave’s four sons to tragically pass away. His 15 year old son, Arthur died in 2015 after falling from a cliff near Brighton.