Marty McKenzie, Ben Volavola and Richie Mounga will compete for the starting five-eighth spot at the Crusaders next Super Rugby season.
They replace the departing Dan Carter, Colin Slade and Tom Taylor, the Crusaders said on Thursday.
Maori All Black Marty McKenzie will move south from the Chiefs, with Crusaders head coach Todd Blackadder saying 2016 will be his opportunity to stamp his mark.
"One of Marty's strengths is his versatility, with the ability to play almost anywhere in the backline as well as kick goals," he said.
"We see him primarily as a first five (five eighth) and, at just 22 years of age, there is plenty of untapped potential in him yet."
Mounga has been contracted to the full squad after spending a season developing his trade in the Crusaders' wider training group.
"We've been watching Richie develop, and we look forward to helping him continue to grow his game and build his experience," Blackadder said.
Volavola is moving from the Waratahs to join the Crusaders next season, Blackadder saying assistant coach Tabai Matson had suggested the Australian-born Fijian would be a valuable addition as an athletic first five with impressive pace and a handy kick.
"We're excited about the potential we can see in Ben. He has all of the makings of a great player and is itching to get some more game time to show what he's got."
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