Hull target Fortune pens three-year deal with Celtic
Although Hull showed a large amount of interest, Fortune decided he wanted to play for Celtic.
"This is where I want to be. Having met the people at the club and knowing all about the club's fantastic pedigree and support, this is where I saw my future," he told the club's official website.
"I am looking forward to the challenge of winning the league title, competing for the cups and playing in Europe, in front of the Celtic supporters."