The midfielder is on-loan to June from QPR.
"It's been a dream to play in such a glorious shirt," Taarabt told Forza Milan.
"I hope it's just the start of a fantastic adventure at Milan.
"I scored some good goals in England too but, for sure, the one I scored at Napoli was one of the most unforgettable ones of my career.
"I was one of the important players at the stadium where Maradona played, and I have always been a big fan of his."
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