Blac Chyna Pledges to Train Rob Kardashian Herself Every Day for 'Five Weeks,' Reveals His Goal Weight

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Blac Chyna is ready to whip her husband-to-be into shape!

The 27-year-old model announced on Snapchat on Wednesday that she’s going to start training fiance Rob Kardashian herself, setting a target date of her upcoming birthday on May 11.

WATCH: Blac Chyna Gushes Over Engagement to Rob Kardashian: 'I'm So Blessed and Honored'

“Today I’m going to train Rob,” Blac Chyna announced in one snap. “We’re going to start a journey, I’m going to start training him myself.”

In subsequent clips, Rob weighs himself -- registering 248.4 pounds -- and set a goal weight for himself of 200-210 pounds.

“I think that’s perfect,” Blac Chyna tells her new fiance.

WATCH: Tyga Says He's 'Happy' About Blac Chyna's Engagement to Rob Kardashian, Worries Over Son King Cairo's 'Situation'

“Do you give me permission to train you for the next five weeks, every day?” she asks Rob in another snap.

“Of course,” he answers.

The couple have yet to set a wedding date, but it’s clear that Blac Chyna is ready to help her man get motivated and slim down. See how they celebrated their recent engagement in the video below.

WATCH: Rob Kardashian and Blac Chyna Celebrate Engagement With a Backyard BBQ and More Pics of Her Massive Ring