Following this error, the corporation were hit with over 600 complaints, as they covered Mescal's Oscar nomination for his role in Aftersun.
Covering his Oscars nomination, a BBC Broadcaster said, “2023 Oscar nominations: British actors Paul Mescal and Bill Nighy are nominated for leading role".
The BBC later apologised for this mishap.
“In text running across the screen we reported that Paul Mescal was one of two British actors who had been nominated for an Oscar for a leading role. The text should have said that Paul Mescal is Irish. We apologise for the mistake", a statement read.
In light of this error, the BBC received a total of 605 complaints.
Kildare native Paul Mescal is in the running for Best Actor, alongside fellow Irish actor and Banshees of Inisherin star Colin Farrell. Other nominees also include Elvis star Austin Butler, Billy Nighy (Living), and Brendan Fraser for The Whale.