Controversial One Nation leader Pauline Hanson has joined the fight against an Islamic community centre and prayer hall proposed at Kemps Creek.

Ms Hanson, arguably Australia's most divisive politician, was one of two keynote speakers at a fundraising dinner for the Protect Penrith Action Group on Saturday night in Liverpool.

The second was another prominent anti-Islam politician Kim Vuga, who was one of the most contentious contenders on SBS reality TV show Go Back to Where You Came From.

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