Martin Compston is known for his lead role as Anti-Corruption Unit Detective Sergeant Steve Arnott in the BBC crime drama Line of Duty.
And the Celtic supporter took time out of his busy schedule to send a video message to the Lurgan girl on her very special birthday.
Posting the video on Facebook, Olivia and Jay’s dad Martin said: “Olivia, Thanks to your Wee Brother your favourite actor has sent you this....All in the Line of Duty.”
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Martin said this morning: “Jay knows him through Celtic and asked him to send his sister a message as she loves him in Line of Duty.”
Lots of Line of Duty fans were delighted for Olivia who responded: “Love it.”