Guns N’ Roses shout out ‘Hello, Sydney!’ – except they were in Melbourne

American rock group Guns N' Roses have apologised to their Australian fans after shouting "Hello, Sydney! " when they stepped on stage in Melbourne.

The blunder  met boos from the audience, after the band reportedly arrived late for the show at Melbourne Cricket Ground on Tuesday.

Shortly after, the band posted on Twitter: “Melbourne! Accidentally after 30 years McBob made an error, we’re truly sorry. Thank you for coming out tonight!”

Guitar technician McBob has been introducing the group on to stages around the world during their latest shows.

The event followed two nights performing in Sydney over the weekend as part of Guns N’ Roses’ ongoing global tour, Not In This Lifetime.

The tour features Axl Rose, Slash and Duff McKagan.

Fans have already shown appreciation for the group’s public apology on social media.

One follower replied to the post on Twitter with: “One mistake every 30 years... Reasonable.”

Another added: “As long as he shouts ‘Birmingham!’ when you’re in London this summer, all is forgiven.”

Guns N' Roses are not alone in getting their stadiums and venues mixed up. In 2009, pop star Britney Spears mistook Manchester for London, while Bruce Springsteen gave a shout out to Pittsburgh, when in fact he was on stage in Cleveland. Not to be out done, Robbie Williams had a little country trouble in the Balkans in 2015, confusing "Zagreb" (Croatia) with Belgrade (Serbia).

Guns N’ Roses play a sold-out concert at Slane Castle, Co Meath on May 27th. – (PA)