Controversial Canadian anti-immigration activist Lauren Southern arrived in Brisbane ahead of her speaking tour, and she didn't take long to stir up controversy.

Sporting a T-shirt with "it's OK to be white" phrase emblazoned on the front, the 23-year-old arrived in Australia after her working visa was approved by the Australian government on Tuesday.

The phrase originated as a poster campaign organised on the American imageboard 4chan, and has been spread by white supremacist groups.

“It’s a pleasure to land here and see Australia upholding its commitment to free speech and Western culture — something that may not be here for much longer if left-wing Australian politicians continue their pathological worship of multiculturalism,” Ms Southern said.

Twitter

Ms Southern has declared "Australia is at a crossroads" to retain its borders and in danger of becoming "another victim of multiculturalism".

Ms Southern's tour producer Caolan Robertson on Friday said: “The world’s most censored and controversial tour is about to take place and Australia has never seen anything like it.”

This is so dramatic it’s almost comical.



I like how one of their reasons to protest our event is the screening of a documentary on the persecution of whites.



Really shows their true colours. @StefanMolyneux pic.twitter.com/1ASfeYw9fa — Lauren Southern (@Lauren_Southern) July 5, 2018

Ms Southern previously applied for an Australia Electronic Travel Authority (ETA) to enter the country, which was the catalyst for the rejected of her visa.

A Department of Home Affairs spokesperson said Ms Southern's application was denied because she was ineligible for the ETA.

She will be joined by far-right activist Stefan Molyneux for the tour hosted by Axiomatic Media, which includes talks in Sydney, Melbourne, Adelaide, Perth, Brisbane and Auckland.

Her visit will also feature screenings of her new documentary titled Farmlands, which delves into racially motivated deaths in South Africa.