From Ros na Run to entertaining American audiences, actor Lochlann O Mearain has bagged a part opposite supermodel Caitriona Balfe in TV hit Outlander.

The father-of-four revealed his news to the Herald Diary this week and will be watching himself on screen in the coming weeks, when his episodes air on Starz TV in the US.

Killiney native Lochlann will be playing the mysterious rogue Horrocks in the hit TV show, a televised adaptation of the popular novel by Diana Gabaldon.

And he's delighted that he got to ooze some Irish charm in front of the cameras.

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"I'm the Irish outlaw, so that was a nice part, I really enjoyed shooting it," he said.

"We filmed the scenes over in Glasgow and it was great fun - a very exciting production to be involved in."

Already a ratings success Stateside, Outlander debuted at ComicCon in America in July and is being hailed as the next Game of Thrones.

It centres on English combat nurse Claire Randall who is transported back in time from 1945 to 1743 Scotland.

Finding herself transported 202 years into the past, she is forced to marry charismatic highlands warrior Jamie Fraser, played by newcomer Sam Heughan, and a passionate affair ensues.

Monaghan beauty Caitriona Balfe, who is the only Irish woman to ever walk the Victoria Secret runway, plays the lead role of Claire - and Lochlann insisted she couldn't have been nicer on set.

"Caitriona is so sound, I didn't actually know she's Irish at all, which is funny - she's a great girl," he said.

The actor is making waves in the TV industry at the moment and in addition to Outlander, has just wrapped on the forthcoming instalment of The History Channel's Vikings.

Now he's promoting his new movie, Poison Pen.

The gaeilgeoir shot the project alongside Love/Hate stars Susan Loughnane, Aoibhinn McGinnity and Mary Murray.

"It was intense because we had such a short amount of time to shoot it and everyone worked beyond hours to get it down," he said.

"It was tiring because there's very little structure on a film, it's just all hands on deck and it becomes your whole focus for a while, but you're always proud of things you're most proud of."

And he admitted working opposite the sassy Love/Hate ladies left him feeling a tad jittery.

"I was a bit nervous on set meeting all the Love/Hate girls, but they're lovely."

Herald