Kim Kardashian, Kourtney Kardashian, Rob Kardashian Showcase Transforming Bodies on Family Outing: Pictures

Kim Kardashian
Kim Kardashian Fabio Jack/X17online.com

Kardashian party of three! On Wednesday, Feb. 27, Kim, Kourtney, and Rob Kardashian stepped out to dinner together at Stanley's Restaurant in Sherman Oaks, Calif., where each showed off a very distinct sense of style — to match their very distinct and much-talked-about bodies.

Kim, who is expecting her first child with boyfriend Kanye West in July, played up her world-famous curves in a typically sexy ensemble: a form-fitting neon and grey color-blocked dress, a black blazer, and bright white pumps. The frock, it turns out, is from the 32-year-old's fashion line for Sears, a collaboration with sisters Kourtney and Khloe.

"I love Kim's Kardashian Kollection dress she's rocking!" Khloe tweeted on Feb. 28, along with a photo of her pregnant sibling in the outfit. Kim replied: "Sears baby! Wow, I look skinny. Haha!"

Kourtney, meanwhile, went with a more casual but still sexy look for the family outing: a tan shirtdress that showed off her slim stems, aviator sunglasses, and hot-pink heels with studded straps. She also had the world's cutest arm candy — 7-month-old daughter Penelope, who was stylishly clad in a Burberry-print pleated skirt and white blouse. (The 33-year-old E! reality star and boyfriend Scott Disick are also parents to 3-year-old son Mason.)

Kourtney Kardashian
Kourtney Kardashian with baby Penelope. FabioJack/X17online.com

Last but not least was Rob, 25, who looked very Kanye-esque in baggy leather pants, red sneakers, a black T-shirt, and a backwards L.A. Dodgers baseball cap. Rob is currently on a mission to lose the weight he gained during his yearlong romance with Rita Ora.

"It's crazy how this whole year, my whole relationship was only negative," he said on a recent episode of Kourtney & Kim Take Miami. "All I did was gain f–cking 40 pounds and lose so much money. I'm so insecure. I weigh like 215 pounds. I hate pictures. I hate everything."

Rob Kardashian
Rob Kardashian arrives to have dinner with his family at Stanley's Restaurant in Los Angeles, California. Karl Larsen/INFPhoto.com

After gaining an additional 10 pounds, the sock designer decided it was time to take action. He came up with a diet and exercise plan that he's been documenting on Twitter for the last several days.

"Another fat boy breakfast," he tweeted on Feb. 21, alongside a picture of a small omelet and a grapefruit. "Let's go! 5 mile run next. 50 pounds got to go!"

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!