The Bulls had been linked with the dual code international since he was released from his contract with the Welsh Rugby Union last month.

Harris, 28, left Leeds in August 2001 in a well-publicised cross-code transfer worth around £1.5million but decided to end his spell in union a year early.

Harris, who has signed a four and a half year contract with the champions, said: I am very excited about coming back to a very strong Super League and particularly to the Bulls, who are one of the best clubs in world rugby league.

They have had considerable success since the launch of Super League, including their treble trophy win last year. I hope to achieve greater glory with them in the future, both at a domestic and international level.

Bradford chairman Chris Caisley said: As soon as we were alerted as to Iestyns availability, we moved quickly to secure his services.

He will be a great addition to what is already an extremely talented squad of players and his signing will send out a clear message of our intention to remain at the forefront of the sport.