Famous for his portrayal of Declan Brady on the popular Irish soap opera Hollyoaks, he also appeared in a 2014 episode of the television series Vikings.
During his early years, he frequently accompanied his actor father to the set of the soap opera Coronation Street and consequently developed an interest in acting. He made his debut on Hollyoaks when he was only fifteen years old.
Between 2011 and 2015, he attracted more than fifty thousand Twitter followers.
The son of Lisa Smith Duffy and actor and Boyzone pop group singer Keith Duffy, he spent his early years in Dublin, Ireland, and grew up with a sister named Mia.
Actor Emmett Scanlan is famous for playing Duffy's Hollyoaks character's bad boy father, Brendan Brady.