Kourtney Kardashian stuns in little black dress at PrettyLittleThing launch event

Kourtney Kardashian shone bright on her big night!

The "Keeping Up With the Kardashians" scene-stealer stepped out on Wednesday night to celebrate the launch of her collaboration with PrettyLittleThing, and she deservedly stole the show in a sparkling little black dress.

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Kardashian increasingly toned physique was firmly on display in the slinky number that featured a low neckline and spaghetti straps. She finished off the look with a sleek high pony and strappy black heels.

See Kourtney Kardashian's sexy look:

The 38-year-old mother-of-three wasn't the only star to celebrate her launch, of course. Other celebrities attended the event at Poppy in Los Angeles to help the oldest Kardashian sister celebrate her new fashion endeavor.

Lori Loughlin and look-alike daughter Olivia Jade attended the event together and looked like total twins, while Rob Kardashian's ex Adrienne Bailon supported her old pal. Also there? "Vanderpump Rules" star Lala Kent, singer Christina Milian and Chantel Jeffries, who models for Khloe Kardashian's Good American clothing line.

See all of the red carpet looks:

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