The former Boyzone member, who recently finished a brief return stint on the soap, claimed that his character was ready to abandon his womanising ways.
"Yeah, I think they're great [together]," he told The Mirror. "Ciaran has had a roving eye for years and has bed-hopped all his life, but at this stage I think he does want to settle down and marry Michelle."
Duffy added that he was happy to be involved in a big Coronation Street wedding before leaving the show.
"When you're working in this job you want the big storylines," he said. "Especially when you don't go home to your family every night. So the busier you are the better. A Corrie wedding is always eventful."
Duffy said that he was willing to move from Ireland to the UK next year in order to stay on Coronation Street.
> Coronation Street star Kym Marsh teases Michelle, Ciaran fall-out
> Keith Duffy gives away Corrie exit details