LeBron James is the King, so it only makes sense he met the most known royal couple on the planet. But he also managed to commit a royal snafu in the process.

After James' Cavaliers beat the Nets in Brooklyn on Monday night, he snapped some photos with Prince William and wife Kate Middleton, who took in the game during their stateside visit (and also met the US form of royalty -- Beyonce and Jay Z).

Everyone is all smiles, but it turns out that James committed a major faux pas. He put his arm around Middleton and that is a no-no -- you're not supposed to touch members of the royal family.

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Check out some more pics of their encounter below, as well as some of the meeting from James' Instagram account:

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Getty Images
Getty Images