Gillian Anderson could become a fully-fledged British citizen after the American X-Files actress has lived in London for more than 20 years

The truth is out there. But maybe not for long as American actress Gillian Anderson, who played Dana Scully in the cult 1990s TV thriller, could be on her way to be becoming a naturalised British citizen. The office in Mark Lane, in the City of London, is appointment-only and also handles other immigration paperwork, so Ms Anderson could merely have been renewing her residency visa. Ms Anderson, 55, was spotted leaving a UK visa and citizenship office Gillian Anderson has lived in London for over 20 years as an American citizen The renowned actress pictured outside the office on Mark Lane in the City of London Ms Anderson was wearing a long black jacket and held a black handbag and mobile phone She could either have been looking to make the UK her home or have just been renewing her residency But she is in a long-term relationship with British writer Peter Morgan, creator of The Crown, and has made several TV projects here. Ms Anderson received an honorary OBE, a medal reserved for foreign citizens, in 2016 The actress is in a long-term relationship with British writer Peter Morgan The Chicago-born actress once said: 'I've been asked whether I feel more like a Brit than an American and I don't know what the answer to that question is.