Controversial 'alt-right' political commentator Lauren Southern is headed for Australia in July, on a speaking tour that will include Perth.

Controversial Canadian blogger Lauren Southern is heading to Australia, with dates booked in Melbourne, Sydney, Brisbane, Adelaide, Perth and Auckland.

The Canadian anti-Islamic immigration firebrand, who boasts more than a million social media followers, will be accompanied on speaking engagements in Australia by fellow countryman Stephan Molyneux, a podcaster who was described by the Washington Post as "one of the alt-right's biggest YouTube stars".

Described by some as a peddler of online hate, Ms Southern was denied re-entry to the United Kingdom in March after she distributed flyers near London in February which said, "Allah is a gay god".

UK border authorities determined her political activites were "a serious threat to the fundamental interests of society and are likely to incite tensions between local communities in the United Kingdom".