Ewan born in Crieff on 31st March 1971, in Perth Royal Infirmary. His family was however based in Crieff; Ewan being the younger of the two sons of James McGregor and Carol Lawson, both school teachers. The McGregor line can be traced in the area for several generations, going back to Duncan McGregor, Ewan's great-great-greatgrandfather, who was born in Fortingall in the early nineteenth century.
Ewan may sound as Scottish as they come - but he had a South American great grandad called Juan.
The revelation about my dear Ewan, was uncovered as census records from 100 years ago were released online yesterday.
McGregor’s great grandad, known as John McIndoe, was born in Chile in 1884 to a Scots father and was originally called Juan.
He worked as chancellor of the Chilean consulate in Glasgow in 1911 and his daughter married a grocer called James McGregor.
The couple had a son in 1942 also called James, who is Ewan’s father.
The archives show the personal records of 4.7million Scots taken on the April 2, 1911.
Relatives of celebrities including McGregor, Robert Carlyle and chef Gordon Ramsay are featured online.
Ramsay’s great grandparents James Watson Ramsay, a hoistman, and Jeanie Beaton Ramsay were living in Paisley in 1911 with their family.
And Robert Carlyle’s grandfather Peter Gordon was 15 and working as an apprentice in Glasgow.
Registrar general Duncan McNiven said: “We are releasing details we have kept secret for a century, just as we are promising to do with the 2011 census.
“The 1911 census gives us a snapshot of what Scotland was like before the Great War.
“Many thousands of the young people recorded here never returned from the battlefields of Europe.”
Famous Scots who appear on the 1911 census include St Trinian’s actor Alastair Sim and TV inventor John Logie Baird.
The 1911 census will be made available at scotlandspeople.gov.uk.