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.

PHOTOS: Kim's body evolution

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!"

PHOTOS: Kim's best booty moments

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.)

PHOTOS: The Kardashian family, then and now

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.

VIDEO: Rob calls Scott Disick an "alcoholic"

"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."

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!"

This article originally appeared on Usmagazine.com: Kim Kardashian, Kourtney Kardashian, Rob Kardashian Showcase Transforming Bodies on Family Outing: Pictures