City Sign Newcastle Midfielder
The Whitehaven-born midfielder has not played for the Premiership side's first team yet, but he made 16 starts for Carlisle on loan last season, scoring three times.
Jan Molby said after the announcement of his first signing as Hull City's manager: "He's a young player who made a big impression at this level with Carlisle last year and having got that experience under his belt I'm sure he'll be even better for us in the coming season.
"We did ask Newcastle about the possibility of doing a permanent deal but they turned that down because they rate him very highly.
"But we've got the next best thing which is having him here for a season and he's a great acquisition.
"He's young, mobile, has real pace and wants to play - in fact he can't wait for the season to start which shows how enthusiastic he is.
"But aside from that he's a terrific footballer and will fit well into the midfield three of a 4-3-3 system.
"We'll encourage him to go forward a lot because he can score goals and that's something we lacked last season.
"Having seen him play I made a mental note that I would have to try and get him if he ever became available and I'm delighted that Stuart is coming here."
When Molby's Kidderminster side played Carlisle in February Green set up the second goal in a 2-2 draw, and he also claimed an assist a month earlier when United were at Boothferry Park.