Miller, 20, will head to the UK as soon as he receives the necessary visa clearance, and ends the Airlie Birds’ long search for a new half-back.
“It looks like it’s a great time to be joining Hull, they have a strong roster and what looks like a great stadium so I can’t wait to get over there and get started.”
Hull have been short in the halves since the departure of Brett Seymour, who left the club by mutual consent last month.
Coach Peter Gentle said: “It’s a timely acquisition for us in a position we have been looking to cover for some time now.
“I would like to thank the Tigers for their understanding and cooperation in making the signing a possibility, in particular giving us the chance to recruit a player midway through their current campaign.”
Miller has made nine appearances in the NRL, making his debut as an 18-year-old back in 2011.
He will continue to train in Australia until he receives clearance to move to Hull, when he will then be available for selection.