Just in time for summer, Kim Kardashian is officially the skinny sister!

While Khloé Kardashian has been getting all the attention for her “revenge body,” Kim has been behind the scenes losing tons of weight and fans are definitely noticing!

After welcoming son Saint in 2015, the KUWTK star revealed she was determined to lose 70 pounds — a goal she reached and surpassed just one year later.

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“My butt and my hips are the last to go, but I’m not stopping!” she told People. “After having two kids, and being able to get in shape and still feel good about myself, I’ve never felt better. I worked my a– off, I’ve altered my life and I’m proud of that.”

Last August, she gave her Snapchat followers a look at her scale, which read 125 pounds. However, it wasn’t enough for the mother-of-two, who went on to lose an additional six pounds when she checked in with fans this week — controversially thanking the flu for the boost in a since-deleted tweet.

To see Kim flaunting her weight loss in a sexy silver bikini, check out the video below!