What would you do if you could turn back the clock?
Keep up the piano lessons, learn Spanish and a kitchen extension are just some things our celebs would do, writes Deirdre Reynolds
Rising Irish star Domhnall Gleeson has just made his leading man debut in cinemas throughout the country.
Gleeson – whose dad is actor Brendan – carries About Time, Richard Curtis's latest romcom.
In it, he plays Londoner Tim, who inherits the ability to time travel when he turns 21, and uses it to woo Rachel McAdams.
In reality, Dubliner Domhnall (30) says he'd use his time over quite differently: "I would spend more time with my grandparents who have now passed on.
"You can always go back and be less selfish about some things or to a time when you imagined you might have let people down," he adds.
"But unless it caused untold damage it's very difficult to go back and say you wouldn't do it again.
"The boring answer is the true one – there is very little I would change in my life because I'm happy."
Canadian co-star Rachel McAdams may herself be experiencing a sense of déjà vu as the flick hits big screens here.
It's the 34 year-old's third time to star in a time travel movie, after The Time Traveler's Wife in 2009 and Midnight in Paris in 2011.
Next time, she says it's her turn to go back to the future: "It's weird – I've never actually been a time traveller myself in any of those films. I feel like [the] next time travel movie I do, I'm going to travel!"
Meanwhile, Gleeson joins a long line of Hollywood stars to tear the space-time continuum in the name of love. These include Bill Murray (Groundhog Day), Hugh Jackman (Kate & Leopold) and Keanu Reeves (The Lake House) are just some of the other leading men who have the space-time continuum in the name of love.
Ironically though, director Richard Curtis reckons the romcom is all about appreciating the present: "In a funny way, the message of the movie is to relish the day – to relish your life."
Here, some of Ireland's most famous faces reveal what they'd do differently if they could wind back the clock:
Republic of Telly, RTÉ Two
"If I could go back in time, I would never have given up piano. I played for around two years, from the age of 10 to 12, but quit because I hated having to practise every day and the pressure of exams – plus I discovered boys! One thing I would happily skip over, on the other hand, is my goth phase, when I shaved half my hair off!"
Rick In The Afternoon, RTÉ 2fm
"My 'do-over' would have to be college. I quit my arts degree at UCD after a year to start working in radio. And I've often thought how I'd love to go back and do it all over again. Mind you, it didn't seem to do me any harm when I won Celebrity Mastermind last year! Anyway, without a time machine, I'll just have to settle for reading a lot in my spare time."
Ros na Rún, TG4
"Turning 30 recently wasn't as scary as I thought it would be. I'm definitely much more confident and happier now than I was in my 20s. Of course, if someone asked me if I wanted to be 21 again, I wouldn't say no! I wouldn't mind going back with the knowledge I have now. One thing that's on my bucket list is to learn Spanish – but there's still plenty of time!"
The Ronan Collins Show, RTÉ Radio 1
"For as far back as I can remember, I have always loved music. I made a good living as a drummer, and can manage a few chords on the guitar, but have never had any formal training at any instrument. When I go back to 1969, I'm going to learn to play the piano so that by the time I get back to 2013, I will be the life and soul (or biggest bore) at every party!"
"A few years ago, we got a home extension, but it didn't quite work out as planned. Now I'm getting a whole new kitchen put in, and it's driving me insane. If I could go back in time, I would just have the whole thing levelled and start again. On the plus side, I'm getting the biggest wine cooler I could find installed and am busy stocking it with Moët, which I plan to crack open when the building work is finally done!"
Savage Sunday, Today FM
"There's a quote in About Time along the lines that: 'The whole butterfly effect thing is a bitch'. That'd be my fear – I'd go back and fix something only for it to have a knock-on effect that would change now. And I don't want to change now. I like now. That being said, now might be slightly better if it included less debt. So maybe I could risk a little butterfly effect by going back and ripping the pen out of my hand every time I attempted to sign a loan document between 2004 and 2007 ... "