The former Manchester United defender signed for the Rs yesterday.
Linking up with Redknapp always appeared to be a strong possibility and the R's boss is delighted to be able to work with Ferdinand again.
"Rio's a fantastic player and a great professional, I'm delighted we've been able to bring him here," he said.
"I signed Rio as a 14-year-old. He was class on the field and off the field then, and he's continued in that manner throughout his career. During his time at Manchester United, he was the best defender in Europe, if not the world.
"To bring him to QPR, when he's still got so much to offer in terms of his quality, class, experience and know-how, is a remarkable coup for the club."
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