An Irish incest couple, who never knew they shared the same father when they met, plan to get married later this month.

They already have a child together after meeting in a nightclub and falling in love.

The man known only as James, never knew his real biological father and says he was prevented from finding out by authorities.

"The way I see it, if the system can know about things and hide the facts, then I can do the same — they turned a blind eye and so can we," the man, told the Irish Mail.

It is forbidden in Irish law for siblings to marry each other.

"People can criticize and say it is not right, but they should say the same about what was done to me in the family law courts."James said.

He  revealed his long struggle to find out who his father was, which was only resolved when he and his wife became suspicious and took a DNA test.