An 89-year-old man has admitted shooting at a sex worker outside a Melbourne brothel.

Domenico Natale fired a shotgun twice at the woman in the driveway of Romantics brothel at Brunswick on July 21, 2017, after a breakdown in their relationship.

Domenico Natale outside court before an earlier hearing. Credit:AAP

The octogenarian pleaded guilty to four offences during a Supreme Court hearing on Friday.

At about 10am on the day of the incident, Natale stepped out of his car and fired at the sex worker, the court had been told previously.