TIL After living in London for 14 years, Cillian Murphy moved back to his native Ireland in order to prevent his children from having posh English accents
If you read the article, he wanted to raise his family in his native Ireland and also to spend more time with his parents. Sounds like a well grounded fellow.
My cousins spent 2 years on a military base and got an English accent and I thought it was the coolest thing, but then they lost it within a year of moving back to the states. Now they just sound generic American. Sad.