The Australian High Commissioner will be in Cornwall on Thursday to take part in a Cornish homecoming festival.
Michael L'Estrange will attend the festival in Newquay
Michael L'Estrange will be finding out about the hundreds of Cornish people who left the county in the 1800s to set up home on the other side of the world.
Mr L'Estrange will hear how Cornwall's mining expertise and labour transferred to countries across the world.
He will also get to talk to some of the county's industrial archaeologists and historians.
Dehwelans is the Cornish word for homecoming and the first festival in 2002 attracted hundreds of people from all over the world.
Activities, food and entertainment during the six-day festival in Newquay celebrate everything Cornish.
Mr L'Estrange said: "The hundreds of thousands of people who came from Cornwall in the 19th Century really made a vital contribution.
"They were known as fair-minded, hard-working, practical and innovative people who kept their own distinctiveness as Cornish people but very much adopted a new life and way of living in Australia."
The festival runs until 3 May.