"This is weird, this ain't right," Rylan joked. "It's really frightening."
Three celebrity impersonators appeared on This Morning to promote Chanel 4 show Lookalikes.
Rylan explained that he met Danny a few months after he finished The X Factor.
"Halfway through X Factor, they changed his look from blonde to dark, I was already dark, I met my agent, and things went from there really," said Danny.
Lookalikes is a fly-on-the-wall documentary about a lookalike agency that has fallen on hard times.
Andy Harmer, who runs the agency, has been a David Beckham lookalike for years. He explained: "It is based on my reality. It's a reality comedy hybrid. It's what it's like to be a lookalike, and me running the lookalike agency with some very funny consequences.
"[Life as Beckham] is alright, it's not as good as it was when he was in his prime and captain of the England team. Now he's retired, I thought I've got to find something to give me life after Beckham."
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Watch the interview below: