Kris Commons says it was an "easy decision" to join Celtic after leaving Derby County to move to Scotland.
The winger, who was also the subject of interest from Rangers, has signed a three-and-a-half year deal and is thought to have cost Celtic £300,000.
"I would have chosen Celtic, no matter what," said the 27-year-old.
"I would go as far as to say it's a dream come true. The opportunity to play in front of 60,000 people week in, week out is magnificent for me."
Rangers were in a position to do a deal to sign Commons following the sale of Kenny Miller but, asked if he had spoken to the Ibrox club, Commons replied: "No. I think it was mainly talk from yourselves (the media). There was no talk from our side.
"The things that went in the press - the wages, the money - was all nonsense. Once I knew of Celtic's interest, it was an easy decision for me.
Commons had been courted by both halves of the Old Firm
"It's a young talented squad and hopefully I will enhance it and give me my best footballing years of my career."
Commons consulted his former Derby team-mate Miller about the prospect of joining Neil Lennon's side, with Miller having played for both halves of the Old Firm.
"I spoke to Kenny Miller and Stephen Pearson who had nothing but praise for the club," said Commons.
"Kenny picked up from what Stephen and Mick (Stephen) McManus, who used to be here as well, said and it was all positive, nothing was negative.
"They said I would love it up here and that you would be treated like a king.
"It is one of the clubs that most people don't have a bad word to say about.
"When you speak to players who haven't played here, they are itching to come up and the players that have had the opportunity to play here, when they do leave, always wish they could get back."
Scotland international Commons, who also played with Lennon at Nottingham Forest, will go straight into the squad for Saturday's Co-operative Insurance Cup semi-final against Aberdeen.
I have certainly watched him play a lot of times and I think he will add to Celtic's quality
Scotland coach Craig Levein
"It's a player-manager situation," said Lennon. "I'm quite detached from my players anyway and Kris knows that.
"I haven't brought him in because he's my mate. I brought him here because he is a very good player who will hopefully get better with us.
"He's intelligent, grounded and hungry and hopefully this is the platform for us to take his career on. What he will do is improve us and influence the team and squad on and off the field.
"He will provide a goal threat from the wider areas or deeper-lying areas behind the striker.
"He is in contention for tomorrow."
Lennon is also actively seeking defensive reinforcements but played down speculation about a potential move for Newcastle's Sol Campbell.
Forest's Kelvin Wilson has signed a pre-contract agreement to join Celtic in the summer and Lennon had been keen to agree a transfer in the current window.
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