Pauline Hanson has hired a former economic advisor to US presidential candidate Donald Trump.

The One Nation leader on Friday night held a free public forum in Rockhampton, where her chief of staff James Ashby revealed the move following a question about the economy, the ABC reported.

Senator Pauline Hanson at Parliament House in Canberra on Thursday. Credit:Andrew Meares

"We have just taken him from the Trump camp, so he's come on board with us, so that's pretty exciting and we need to build credibility on the economics front," Mr Ashby said.

He did not name the advisor but said they had just landed in the country and were "one of the world's leading economists".