Like his father, he has a cross tattooed on his neck, just like David.
Romeo posted a photo of his tattoo to Instagram, captioning it: "Stupid! Thank you."
Justin Bieber, who is friends with Romeo and has a similar tattoo, said he was inspired by former England captain David Beckham.
Added Bieber: "Love it, ur dad influenced me too. Great job."
The elder Beckham has around 60 tattoos that have become emblematic of his image.
He and his second-oldest son went to Manchester United's 3-2 win against Arsenal in December.
Romeo, an Arsenal fan, was disappointed. But he did got Cristiano Ronaldo's shirt, so not all bad.
"Romeo is a dedicated worker who is making a name for himself among advertising as well as on the pitch for David's Inter Miami club's reserve squad, Fort Lauderdale CF.
"Hopefully, this will be a long-term partnership with Puma.
"Like David, Romeo is likely to work with Puma for over a decade."
Romeo debuted in September versus South Georgia Tormenta, 2-2.
He started on the right wing, like his father used to.
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