The explosive 23-year-old will join the Hurricanes this November in preparation for the club's Super Rugby title defence in 2017.
Prinsep said he was looking forward to developing as a player and a person over the next two years.
"I'm excited about the opportunity to press ahead with my career with the Hurricanes and I can't wait to get up to Wellington and get started in what looks like a great environment," he said.
