The stand-off has been linked with moves to other clubs in recent weeks, with him initially having signed a one-year deal when he joined the Robins from Canberra in the close season.
“We’re only seven games into the season but I think we’ve shown some good signs that we can do something this year. This club is definitely going places and I’m glad to be a part of it,” the 30-year-old told Rovers’ official website.
“I’ve really enjoyed my time here since arriving in the New Year. The coaching staff have been excellent, the boys are a tight-knit group and I couldn’t ask for it to have run any smoother to be honest.
“That made it an easy decision in that I know what I’ve got here at Hull KR, how good the club is and how mad the fans are!
“The fans have been outstanding, they’re easily the best I’ve been involved with, particularly that East Stand after a good win. I’ve never heard sound like it and that’s one of the big reasons behind my decision to stay.
“Everybody is so passionate around the place and the city of Hull has been good to me as well. It reminds me of where I’m from back in Australia and I’m excited to stay here longer.”