The EuroMillions UK Millionaire Maker draw's winner, who went by Miss S from County Antrim, took home the prize money.
Despite EuroMillions Millionaire Maker's promise to produce a millionaire in each draw, the November 22 special draw produced 100 European millionaires in a single night.
The Co Antrim native, who used the National Lottery website to play a Lucky Dip, is now among the more than nine million players who win on the lottery's assortment of games every week.
Interactive contestants can choose to reveal their name, stay anonymous, or, like this winner, share certain information through limited exposure.
Great news for Miss S, who has won a million pounds! said Andy Carter, senior winners' adviser at Allwyn, the National Lottery operator.