Named Miss Ireland 2003 and Miss World 2003, she is a model, former beauty queen and actress turned nutritional therapist and bestselling author of the book Eat Yourself Beautiful.
She obtained an arts degree in Sociology and Art History from the University College Dublin in 2006. She was the class prefect at her previous school.
She appeared in Playboy Germany in 2012. She became the face of Holiday on Ice and was signed to Storm Model Management.
Dating Wesley Quirke since 2006, they became engaged in 2013 and wed in the summer of 2014. Their daughter Sophia Rose arrived on November 21, 2019 and their twin sons Hugo and Oscar were born a year later in November 2020.
Her father Chris de Burgh wrote the song "For Rosanna" in her honor.