The actor, currently filming The Bastard Executioner, a historical fiction drama series, was speaking on a radio show when he revealed the news that he and his girlfriend Caitlin Manley, 32, are expecting their first child together.
He said on RTE Radio 1, according to the Irish Independent: "I have a steady woman now, which is good, and we're having a child in a couple of weeks.
"I'm a bit of a late starter alright, but sure better late than never though."
Murphy said that his age wasn't as issue as he haa a "young woman who can do all the running around". What a charmer.
He added: "She’s got a good sense of humour.”
Murphy said he'll be filming in Wales for the next couple of months but will head home to America for a week, to be present at the birth of his first child.
He is currently starring in the second series of True Detective alongside Colin Farrell.