The rapper claimed that Young would have been a better coach for the talent show over The Script frontman Danny O'Donoghue as "he knows what he's talking about".
The pair met each other while appearing on Sky Arts programme The Jo Whiley Show and Green insisted that Young would have been "perfect" for the job.
The 'Read All About It' star is quoted by The Sun as saying: "No-one knows who Danny is. That's really s**t that they dumped Will for him.
"He would have been perfect for that job. He really knows what he is talking about when it comes to making music... I liked him."
Young recently confessed that he was "disappointed" by the way the BBC treated him over The Voice, but revealed that he has received a lot of support from the public.
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Watch the music video for Will Young's recent single 'Come On' below: