He told the club's official website: "One of my mates asked me whether I would join Forest if they got promoted to the Championship. I told him I would do my best and here I am.
"It's a dream come true for me. I always said that one day I would play for Forest - I didn't think it would take this long but I'm delighted it's actually happened.
"It's special for me because my grandfather, who is no longer with us, was a big Forest fan and always said he wanted me to play for the club. Hopefully he's up there now looking down on me.
"It's not about money. I had far more lucrative offers elsewhere but wanted to join Forest and make myself and a lot of other people happy."