LONDON — It's already common knowledge that Idris Elba is Watch A Wife's Secret (2014)something of a badass — just look at him in The Wire, or Luther, or pretty much anything else he's ever been in — but you might not have known that he's also a kickboxingbadass.

SEE ALSO: 19 things all Idris Elba obsessives should know

On Saturday, Madonna shared ringside footage of Elba fighting in London boxing venue York Hall.

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So why is Idris Elba fighting in a famous boxing ring, anyway?

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Well back in August, The Telegraphreported that Elba is currently filming a three-part documentary chronicling his attempt to become a professional kickboxer. The documentary is called Fighter, and it'll air in 2017.

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From the looks of it, Madonna's footage captures part of Elba's ongoing journey.

Another Instagram account affiliated with Elba, 7dub, features clips and pictures of him in training.

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The lesson?

Don't ever, ever get into a fight with Idris Elba.