A source close to the band said: "Gary is smitten with Lisa. They've known each other for ages but things only became serious recently.
"Since they fell for each other, they've hardly been out of each other's sight.
I'm afraid the news will break many fan's hearts - Gary is a bit of a pin-up".
Lisa, who is from Dunshaughlin, Co Meath, stopped playing with Irish singer Damien Rice recently after an abrupt message on Damien's website.
I have calmed down."There may be another explanation.
As even a cursory examination of the album would reveal, Lightbody is in love.
"But it's taken me three years to understand the last one. Gary Lightbody lead singer of Irish supergroup Snow Patrol; Gorgeous..
It was the year of the Arctic Monkeys, when the Sheffield tyros came roaring out of My Space with the fastest-selling debut album ever.
The millionaire pop star admitted recently that despite his sexy image, he finds it hard to meet girls.
But now Gary, 30, is blissfully in love with 26-year-old Lisa who he has known for years.
It's much easier to write when you are feeling sad and self-pitying."But there's suffering for your art, and there's just plain stupidity.