Queen Elizabeth II will appoint a Muslim convert as her High Sheriff or representative for the county of Lincolnshire.
The Earl of Yarborough Charles John Pelham, who uses the name Abdul Mateen, has been nominated and is expected to take over the unpaid role from next year.
Pelham, 50, inherited a 68-million pound estate from his father, the 7th Earl of Yarborough, in 1991.
The estate includes Brocklesby Park in Lincolnshire, 27,500 acres of farmland, and one of Britain's finest private art collections.
The aristocrat is also a master of the Brocklesby Hunt and President of Brocklesby Park Cricket Club.
A graduate of the prestigious Eton College, Pelham took on the name Abdul Mateen after he converted to Islam.
As High Sheriff, an appointment which is yet to be officially announced, he will be the 87-year-old monarch's representative in the county in the east of England.
Britain has nearly 2.7 million Muslims and, according to a study, a number of the country's top landowners are known to have chosen to embrace Islam.
The 2004 study by the 'Sunday Times' had found that 14,000 mostly-elite white Britons had turned to Islam.
