They join co-captains Scott Curry and Tim Mikkelson along with Joe Webber in forming the core of the All Blacks Sevens squad for the next two seasons.
All Blacks Sevens Coach Clark Laidlaw said it was great to have Ware, Molia and Koroi locked in for another two years. All three are currently playing in the Mitre 10 Cup.
“We are really confident in the group we are putting together,” he said.
“Regan and Sione are similar in the sense they have been two of our most consistent players over the past 12 months and both of them are only getting better.
“Regan has matured into a great professional rugby player and he is reaping the benefits on the field from the hard work he is putting in off the field.
“Sione had a stand out season and has developed into a strong leader within our team. He has the ability to play several positions and really stepped up at the big tournaments this year.”
Laidlaw added on Koroi: “It’s there for everybody to see how good he can be. His vision, game awareness and genuine pace combine to make a real point of difference. He has a lot of growing to do, people forget how young he is, but having him commit to sevens and being able to really develop his technical and tactical skills is exciting.”
Kurt Baker, Trael Joass, Andrew Knewstubb and Jona Nareki, who were all part of the World Cup winning team in July, have signed to the All Blacks Sevens for the 2019 season.