Dell'Olio was born in New York in 1961 where her mother Antonia was born and her immigrant father ran a series of delicatessens. She is the eldest of four children; when she was five her family moved back to Italy, to the town of Bisceglie in the Province of Barletta-Andria-Trani.
In 2005, Dell'Olio hosted the show Footballers' Cribs on MTV. She gave viewers tours of the luxury homes of English football players. "Nancy is a dream signing for us," said series executive producer Sean Murphy. "She's the first lady of football, so is in the perfect position to give us a real insider's view."
In June 2007, Dell'Olio had an autobiography published titled My Beautiful Game.
Dell'Olio has visited British Red Cross projects in the UK and in Kenya. She stated, "I have always been a great admirer of the principles and values behind the work of the Red Cross. The thing that really impressed me is that the Red Cross seems to go everywhere, more than any other charity."
Dell'Olio is the chairwoman of Truce International, the British-based charity she founded with Eriksson, which aims to use football as a means of uniting people in areas affected by war.
In May 1998, Dell'Olio was introduced to Sven-Göran Eriksson, the manager of the Lazio football team, and they began a relationship six months later. In 2001, Eriksson became manager of the England team, and he and Dell'Olio relocated to London. In early 2002, Eriksson had a short-lived affair with television presenter Ulrika Jonsson, but he returned to Dell'Olio.
As of May 2011[update] Dell'Olio was in a relationship with Sir Trevor Nunn, but by the end of the year it was reported the relationship had ended. In December 2011 she lost a High Court libel action against Associated Newspapers, publishers of the Daily Mail newspaper, over an article that referred to her as a “man eater”.
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