Fr Michael Duffy from New York has been sent congratulations on Twitter after being mistaken for a footballer of the same name who has signed for the club.
The priest has an almost identical username on the social networking sight as Michael Duffy, a Derry City winger who has signed for the Scottish champions.
I seem to be getting confused with an Irish soccer player by the same name @michaelduffy_ At least one Michael Duffy is a famous athlete!
— Father Michael Duffy (@MichaelDuffy) February 4, 2015Speaking to BBC Radio Foyle, Fr Duffy said: "I started receiving congratulations messages from people in Ireland.
"I was looking at their names and thought, my goodness, I don't know who these people are and why they're congratulating me.
"I finally found out that the other Michael Duffy signed with the Celtics - I've never in my life before been confused with a professional athlete, so it was a first for me.
"My Twitter handle is @michaelduffy while his is @michaelduffy_ with an underscore after it."
He told the BBC he had never heard of Celtic until the mix up.
"I only watch soccer if it happens to be at the world cup or if someone else is watching it, but here in New York we have a lot of international priests coming to us from Ghana or South America, so I'd watch a game with them," he said.
The priest offered God's blessings to the footballer.
Never thought I'd do an interview with the BBC about a soccer player with the same name as myself. God's blessings on @michaelduffy_
— Father Michael Duffy (@MichaelDuffy) February 5, 2015