Brendan O’Carroll, 63, has been married to co-star Jennifer Gibney, 54, for 14 years.
But the actor admitted it wasn’t “love at first sight” between them to begin with.
Brendan said he found Jennifer “frosty” when he met her as he found her “serious” about acting.
“She was so serious that I christened her Frosty,” the comedian told the RTE Guide a few years back.
After becoming friends whilst working together on The Course, love blossomed between them.
Brendan explained a relationship began after he spotted her completing a crossword.
“One morning I came down into the breakfast room and I spotted that Jenny was doing the Irish Times crossword,” he said.
“On the way out I stopped and asked her whether she was doing the Simplex or the Crosaire. ‘The Crosaire’, she said.”
Brendan went on: “Now she was also smoking Consulate. The last person I saw smoking Consulate, drinking coffee and doing the Crosaire was my mother.
“I sat down with her and we finished the crossword.”
“The next morning, she left a photocopy of the crossword at my table,” he added.
Brendan tied the knot with Jennifer in 2005, following his previous marriage to Doreen O’Carroll from 1977 to 1999.
The actor has three children from his previous marriage, Danny, Fiona and Eric.
Their first son, Brendan, died from spina bifida when he was just a few days old.
Meanwhile, Brendan recently revealed he didn’t want to star as Agnes Brown in Mrs Brown’s Boys.
The Irishman explained the woman who was penciled in to play Agnes was off sick with a kidney infection when they did a reading for the show.
Appearing on Lorraine last month, Brendan said: “I thought I would do her lines and then when she was better we would dub her lines in.
“So just for authenticity, I did that voice, that Mrs Brown’s voice, and when it went to the edit it was the editor who said, ‘Who’s that actress playing Mrs Brown?’ and I said, ‘Don’t be ridiculous. That’s me’.”
The star admitted he was reluctant to take on the role when the show was picked up but he soon changed his mind.
He said: ”I got a guy who was a great make-up artist, and I said, ‘Make me up as Mrs Brown as you see her – no mirror – and when you’re finished I’ll turn around and look in the mirror and if I don’t see Mrs Brown, then I’m not doing this’.”
“So I turned around, looked in the mirror, and there was my mother looking back at me.”
All Round to Mrs. Brown’s airs tonight at 9.10pm on BBC One.