Melbourne lord mayor Sally Capp stepped in to intervene in a late-night fight in Melbourne’s CBD last week, aiming to use her "mother's voice" to de-escalate the fracas before she was shoved.

Cr Capp saw four men fighting after getting off the tram at Elizabeth Street. The main instigator in the fight was a heavily-intoxicated man in a Collingwood jumper, according to Cr Capp.

Lord mayor of Melbourne Sally Capp. Credit:AAP

The lord mayor had just got off a tram after watching a Queen concert with her husband and parents. It was her father's 79th birthday.

She told 3AW she had been aware of anti-social behaviour on Elizabeth Street, and decided to take a stroll down the thoroughfare.