Blac Chyna has taken over as Rob Kardashian's new fitness trainer. The couple has revealed they are determined to work together to drop the former reality TV star's weight from the current 248 pounds to 200 by mid-May.

It's obvious that the diet Chyna put her fiancé on has totally worked magic but with their wedding coming up, the model is looking forward to have her 29-year-old groom super fit for his suit!

The pair shared the big news about Rob's slim down mission via their Snapchat accounts, showing him getting on a scale and his weight coming in at 248.4 pounds. Blac later explained that she’s now on a complete and total mission to get Rob back into the best shape of his life.

"So I need to consent, do you give me permission to train you for the next 5 weeks every day?" she said in the video; to which Rob happily replies "Of course."

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Rob later shared his own Snapchat video on Instagram of him on the treadmill jogging, and dripping with sweat afterwards. Blac asked him “How was your first workout?” to which he gave an exhausted look to the camera.

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Blac wants him back in prime condition and has actually set a date for him to hit his target weight: her May 11 birthday! She tagged a Snapchat video where she revealed, "Today I’m going to train Rob, we’re going to start a journey… Getting Rob ready for my birthday May 11 – 5 weeks.” It sounds like the only birthday present she wants from Rob is to see him in his best shape ever…We couldn’t agree more.