Fact Check: What Is Duncan Lacroix’s Nationality and Where Was He Born?

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Convincing millions of viewers that you were born north of Stirling requires far more than roughing up your costume. When Lacroix landed the role of Murtagh in 2013, he faced two major vocal hurdles: developing an authentic, low-register western Scottish dialect and speaking phonetically accurate Scottish Gaelic.

Working closely with dialect coach Carol Ann Crawford and Gaelic consultant Àdhamh Ó Broin, Lacroix trained for hours prior to early season table reads. Highland Gaelic carries specific guttural stops, broad vowels, and dental consonants that trip up untrained English speakers. Ó Broin worked through every script page with Lacroix line by line, drilling the physical mouth shapes until the rhythm sounded second nature.

When Lacroix appeared on panel discussions at San Diego Comic-Con and official fan conventions, his gentle spoken voice caught attendees off-guard. He speaks softly, with rhythmic pacing and clear southern English phrasing, though prolonged exposure to Dublin theatre companies added a subtle lilt to his conversational manner. The contrast between Murtagh's menacing growl and Lacroix’s real voice remains a viral staple on social video platforms.