Rob Kardashian has tweeted Kylie Jenner's actual phone number

He's going to be in a world of trouble for this stunt...

Rob Kardashian has done the one thing you're not supposed to do to your famous siblings - he's put half-sister Kylie Jenner on speed dial to the whole of the internet.

Rob Kardashian
Rob has been angry tweeting (Jeff Bottari/AP)

The reality TV star flipped out when he realised that his family had been organising a baby shower for him, but had not invited his pregnant fiancee Blac Chyna. You know, the actual person having the baby.

Hell hath no fury like a Kardashian scorned, and Rob decided to wreak his revenge in the most vicious way he could think of - by revealing Kylie's mobile number, followed by a series of laughing emojis and the confirmation: "I ain't hacked either this is rob dog lol".

One fan saw his chance and grabbed it with both hands.

Things have previously been awkward between the siblings as Blac Chyna's ex-fiance Tyga, who she has a three-year-old son with, has been in an on/off relationship with Kylie for the past two years.

Tyga and Kylie Jenner
Tyga and Kylie (Andy Kropa/Invision/AP)

It seemed Rob hadn't exactly endeared himself to his in-laws either, though, as in the most recent episode of the E! spin-off series to Keeping Up With The Kardashians, Rob & Chyna, he got an ear bashing from Chyna's mum Tokyo Toni.

She demanded: "When you going to get married? You gotta stop what you're doing. (Chyna) don't need a baby she needs (you to be) a father...You can't do what you're doing. You're going to ruin it."

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