KJ Apa has broken "a billion hearts" after announcing he's getting married.

But never fear, he was only kidding - the Riverdale star cracked the joke after accidentally wearing the same outfit as his friend and fellow music enthusiast, Paul Mabury.

The actor posted a cute pic of the pair holding hands and laughing, saying: "We're getting married!"

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We’re getting married! @paulmabury

A post shared by KJ Apa (@kjapa) on

Fans have commented on the snap saying "congrats" and "a billion hearts break."

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While wedding bells may be off the cards, it seems KJ might be making music with Paul, who is an award-winning producer, a professional drummer and a co-owner of a sample company called That Sound.

Paul posted a similar pic of the pair with the caption: "When the 'artist' ( @kjapa ) & the 'producer' accidentally wear the same thing".

He also joked: "It's all good... as you can see, we don't like working together!"

We can't wait to see what this "marriage" produces.