Corby and East Northamptonshire MP Louise Mensch has announced she is resigning from her role.
The MP, who was elected in 2010, took to Twitter this morning to say she was 'devastated' by the decision.
In a letter to Prime Minister David Cameron she said: 'As you know, I have been struggling for some time to find the best outcome for my family life, and have decided, in order to keep us together, to move to New York. With the greatest regret, I am thus resigning as a Member of Parliament.'
She added: 'It has been an honour to serve the people of Corby and East Northamptonshire. Whether it has been supporting Corby's new free school, or fighting for the truth on the Cube overspend and land development deals, or striving to protect the East Northamptonshire countryside, in my work as the local MP I have always been struck, as I said in my maiden speech, by the pride people have in our area. Corby can be summed up in the single word "pride".'
On Twitter she said: 'I am devastated by the necessary decision that I have had to announce today. It has been an incredible honour serving the people of #CorbyEN'
In response the PM said: 'I know that this has been a particularly difficult period for you and your family and that this will not have been an easy decision for you to make.
'With that in mind, it is with enormous regret that I accept your resignation as the Member of Parliament for Corby and East Northamptonshire, a seat that had been Labour for thirteen years before you. I do so only because I wish to support you in acting in the best interests of your family, which must come first.'
The mother-of-three is married to Metallica manager Peter Mensch who lives in New York.