Fans are freaking out after discovering that Line of Duty actor Martin Compston is actually Scottish.
'The mother of God!'
Yes, if you've been watching the gripping BBC series all these years and thinking, 'there's something a bit odd about DS Steve Arnott's southern accent,' then you'd be correct, as he actually hails from north of the border.
The bombshell was dropped this morning after the 34-year-old appeared on Sunday Brunch ahead of tonight's finale to the fifth season of the tense cop drama.
And fans have taken to Twitter to share their utter disbelief at a twist you would expect from the show rather than real life.
Fans were stunned to discover Compston was actually from Scotland. Credit: PA
One person wrote: "Trying to get my head round Steve Arnott (Martin Compston) having a Scottish accent in real life... "
A second stunned viewer added: "Why is @martin_compston AKA Steve Arnott, putting on a Scottish accent on #SundayBrunch? How strange to hear his actual real life voice!"
A third fan said: "Didn't know @martin_compston was Scottish?! Thought he was from Bow Road!"
While another put: "Watching Sunday morning tele and then @martin_compston comes on and starts speaking Scottish..... how did I not know this?"
I guess it only goes to show what a fine actor Compson is that he has managed to fool half of the country for the past seven years.
The 34-year-old says his London accent can rile up some fellow Scots. Credit: PA
Earlier this year, Compston spoke to XFM about his London accent - which he says 'riles up' some fans north of the border.
He said: "I'm fiercely Scottish as your good self Gordon, but people in Scotland get a wee bit annoyed with it.
"I can't play everything as if I'm from Greenock! I'm an actor! [...] You can't just go into every job saying, 'I'm doing my own accent.'"
He added: "The brief came in as a London detective. I came in doing a London accent, which I'm sure another 20 or 30 actors did, and I got the part. So it's never been a thing, but for some reason, people get riled up about it."
The actor said he was given the brief of a London detective when he auditioned for the part. Credit: BBC
But Compston's Scottish accent isn't the most shocking news fans have received today. In a strange marketing decision, the entire fifth series of Line of Duty went on sale 24 hours before tonight's finale.
Eagle-eyed shoppers spotted the series on the shelves, sharing photos of the DVD on Twitter.
One person wrote: "Very disappointed about #lineofduty spoilers - apparently, some Sainsbury's accidentally selling the S5 DVD early. Avoiding the Facebook group and hashtag now."
Another upset fan added: "#LineOfDuty please please people if anyone has watched the finale thanks to @sainsburys complete disrespect by selling the DVD DO NOT post the info PLEASEEEEEEE."
Featured Image Credit: BBC