Kirsty Bertarelli (born Kirsty Roper) is a song writer, former Miss UK and wife of Ernesto Bertarelli, a Swiss businessman who was the owner of biotech giant Serono until 2007 and winner of the America's Cup in 2003 and 2007 with his yachting syndicate Alinghi.

In the Sunday Times Rich List 2014 ranking of the wealthiest people in the UK, her husband's family were placed 5th with an estimated fortune of £9.75billion. She is one of Britain's richest women. In Swiss Bilanz magazine's ranking of the wealthiest people in Switzerland, her husband's family were placed 4th with an estimated fortune of over CHF 11 billion.