On October 2002, whilst making the film The Boys from County Clare, she became involved with her on-screen love interest Shaun Evans. He is 5 years her junior.
Life imitated art on the Isle of Man when Andrea and Shaun, whose screen characters became lovers, were struck by a strong mutual atrtraction.
But friends and family initially dismissed the relationship as nothing more than a fling, coming just months after the break-up of her relationship with long term boyfriend Giles Baxendale.
Indeed in Ireland, it is now widely assumed that the couple had split up. Despite
the fact that they turned up last Autumn at the Toronto Film festival to promote their new film, Evans`s absence from the Dublin social scene on which Andrea is frequently present had observers to cinclude that the romance had fizzled out.
So low-profile has their relationship been that showbiz websites ran stories announcing they had definitely split but Ireland on Sunday can reveal that not only are they still together but Andrea told us this week, very happy.
Now, as she prepares to launch her new movie and release a new album with the Corrs, Shaun is at her side providing emotional support.
It is he who will provide her with most reassurance when their up-to-now relatively hush-hush relationship inevitably comes under scrutiny during the whirl of media interviews, promoting first the couples new film and then the Corrs` new album after a long hiatus.
For the romance, despite its unlikely matching of a world-renowned entertainer withan up and coming actor, is being viewed as a sign of Andrea``s determination to build a life for herself with someone she can trust, away from suffocating effects of her celebrity status.
Last Summer the couple visited Shaun``s native Liverpool and went to the trendy
News Bar because of its resemblance to Andrea``s favourite Dublin watering hole, Cafe en Seine. The couple queued up outside the bar and when a bouncer spotted them and tried to usher them forward, they insisted on waiting their turn.
A few weeks earlier, in July, they travelled to Liverpool for the Grand National and partied afterwards at the Baby Blue on Albert Dock. For Shaun, who left Liverpool at 14 to study at London`s National Youth Theatre, it was an opportunity to introduce his girlfriend to his hometown and his friends and family.
Those who are close to Andrea remark on her happiness with Shaun, "When they are together, they hold hands and joke around", says a source.
"They are extremely happy in each other`s company. Andrea knows she can completely trust Shaun and he doesn`t seem to be the slightest bit threatened or overawed by the fame"
Andrea, however is adamant about protecting her relationship "We have not split up" she declared this week about the romance which has been conducted in secret for more than a year. !We are very much together and extremely happy but I do not want to get into too much detail at this stage."
Blue-eyed Evans, who gaduated only two years ago from the Guildhall School of Music and Drama, may not yet have the pedigree to which his girlfriend is accustomed but it is at his 720, 000 euro flat that she spends most of her time when in London.
Whether the 23-year old, who has had roles in TV dramas like The Project and Teachers, is at home or away working, Andrea stays at the flat, where she is known to his neighbours.
More distant than older sisters Caroline and Sharon, likeable Andrea who, who turns 30 this May, can appear precious and defensive in interviews and guards her privacy assiduously.
"Her family are still very protective of her" says a source "She is quite sensitive and often seems like a lost little girl although she is nobody`s fool and she``s not afraid to let you know that. she is also great fun sometimes - laughing and clowning around".
Whereas her now married sisters enjoyed long realationships during their years of musical prominence, Andrea Corr has been conspicuously single for most of them.
Without the security of a stable relationship, she was particularly dependent on the family and was openly devastated in late 1999 when her mother, Jean died prematurely from a lung condition at the age of only 57.
As the Corrs` fame grew, Andrea found it increasingly difficult to meet a man she couid trust.
From 2000, she enjoyed an almost two-year relationship with Charlotte Church``s manager, Giles Baxendale. Before that, aside from lunch dates with Robbie Williams, and sightings on the social seen with Huey Morgan from the Fun Loving Criminals, her love life had seemed non- existent.
Andrea often opted to retreat into herself.
Her eldest sister Sharon.has often mentioned the difficulties the band encountered meeting the opposite sex: "It was hard for us to meet boys. Few men would go near you because they were too proud, too intimidated or didn``t want to get involved because their love life would be looked into."
Andrea has revealed how the band``s colossal workload has militated against meeting men.
"It`s all work", she says. "We never really get to socialise. The only guys we see are the record company guys."
For Andrea, who prides herself on her traditional values and distaste for one night stands, it was doubly difficult. On stage, she may engage in Diana like eyebrow lifting as she twists and turns, raising her arms in her familiar Y-shaped gesture and provocatively pouting but in real life, Andrea is wary and expects men to woo her, not the other way around.
"She always had lots of men interested in her but it was difficullt for her, knowing who to trust. She always felt she had to be careful and concious of how things appeared" says someone from her circle.
She broke up with her long-term (ish) boyfriend, actor Shaun Evans, on 2006. “I don’t look back and think, ‘Oh God, I wasted four years.’ I do have faith. I would not step into marriage lightly. I am not married by my own choice, not because no one wanted to marry me. There is a song on the album [Ten Feet High] about marriage, funnily enough, called I Do.” She laughs, before adding, with another laugh, “And no, I don’t sit up in the middle of the night going, ‘When will it happen to me?’”
The song `Ten Feet High` is about breaking up with Shaun. Andrea is not one for half measures.
“When [we] did make each other feel ten feet high, then suddenly you were claustrophobic within it and it was like, ten-feet-high walls around us. I suppose what I’m trying to say is that you’re imprisoned. And it is not him doing it. He’s in prison too. It’s when you’re not inspiring each other anymore. It’s the really sad point of a relationship when you still love each other but it is over; but you have to admit it’s over. And you can’t blame the person. It would be easier if you could go ‘You did this’ or they could go ‘You did that’. It is almost sadder when a relationship ends when there is no blame. It ran its course.”