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The field marshal, prime minister and grand duchess of Fenwick declare war on the United States.

On arrival in the UK, the grand duchess and her children lived independently for a while but soon ran out of money.

In fact, it was a teenage girl — a Russian grand duchess — who is believed to have taken the first-ever selfie, with a box camera, in 1913.

They have already produced four little grand duchesses.

Stephanie plans to renounce her Belgian citizenship in order to - one day - become Luxembourg's grand duchess.