Celtic have won the chase for defender Daniel Fox after agreeing a deal of £1.5million with Coventry.
Skysports.com revealed on Thursday that Fox was set to undergo a medical with the Glasgow club and discuss personal terms.
The transfer has now been finalised, with the left-back thrilled to put pen-to-paper on a four-year contract.
Fox has already linked up with his new team-mates and is set to make his debut in the Wembley Cup over the weekend.
"It's all happened so fast but I'm delighted to be here," the 23-year-old said on Celtic's official website.
"I got a phone call on Thursday afternoon to tell me to head for Glasgow and it's all been a bit surreal.
"This is a massive move for me. I couldn't sleep on Thursday night because I was so eager to get down and meet the lads in London and I can't wait to make my debut."
A number of other clubs were understood to be interested but Fox is happy with his decision to join Celtic.
He said: "I'm a bit shell-shocked, but I'm really grateful to the manager and the coaching staff for bringing me here. It's a dream come true.
"The size of Celtic speaks for itself. You have the history, the fanbase, the stadium and there's the added bonus of European football.
"I want to test myself at the highest level and there is no better place to do it than at Celtic. I'm just looking forward to getting started."