Reality television star Rob Kardashian and Blac Chyna were caught off-guard in their pursuit to lose weight together this week.

Pictures of the overnight engaged couple enjoying a cheat day at fast food hot spot McDonald’s drive-through for breakfast.

Rob Kardashian and Blac Chyna look like their weekly cheat day has become cheat DAYS — they started their day by pulling through a McDonald’s drive-thru for breakfast. No word if they got any hash browns (wouldn’t blame ’em) … but we can see they got OJ. Not the worst diet slipup, but the sugar could be an issue. (TMZ)

Check out what Rob Kardashian said about losing weight on the next page…

Rob referenced his recent weight loss on Instagram this week.

Kardashian’s new fitness plan has sparked major interest from health companies.

A rep from Hydroxycut says they want to hook him up with a weight loss pill called Black — a nice 1-2 punch with Chyna’s workout regimen. Meanwhile, Quest says it’s interested in helping Rob pack on some muscle with protein powder, chips and bars. (TMZ)

Footage of Chyna and Rob talking about their new fitness goals surfaced online last week.

#PressPlay: Aww #BlacChyna really has #RobKardashiam coming out of his shell! #BaeWatch

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