Morgan is the youngest coach in Super League

The 31-year-old, who joined the club in 2005 after impressing with French side Toulouse, took the Robins up from National League One last year.

"This is a huge step forward for me as a coach," said Morgan.

Morgan had been linked with the Leeds job which will be vacated by Tony Smith at the end of the season.

606: DEBATE This will give the whole club a massive boost EY

"I have an excellent working relationship with both the chairman and the chief executive," added Morgan.

"My original contract went up until the end of 2008, but this opportunity gives me the chance to help improve the capabilities of the talented squad that I have.

"As the club's future prospects are extremely bright and, along with the devoted support from our fans, I am very confident the club will succeed in our bid for continued Super League status."

Hull KR chairman Neil Hudgell said tying Morgan to a longer-term contract would help the club plan for the future.

"I am thrilled that we have secured what we believe to be the brightest young coach around, for the next three-and-a-half years," he said.

"For us to make progress, continuity is essential, and the deal we have done with Justin will enable him to continue to develop the side at senior level and equally, and possibly even more importantly, to re-establish and develop the junior academy."