Keith Peter Thomas Francis Julian John Duffy (born 1 October 1974) is an Irish singer best known for his time with pop group Boyzone. An original member of the band, Duffy primarily provided backing vocals. Boyzone became the first Irish act to have four number one hits in the United Kingdom charts.
Following this, Duffy launched an acting career, appearing onstage, as well as landing roles in Coronation Street among others. He finished third in the inaugural series of Celebrity Big Brother.
Duffy is married to Lisa Bradshaw. Before his music career, he spent a year at architectural college.