Her daughter North turned four on Thursday.

And Kim Kardashian decided to go, almost, low key for her toddler’s birthday party.

The 36-year-old star wore a white tank top with grey sweats at Ruby’s restaurant in Los Angeles with husband Kanye West and their son Saint, one, but she did almost bare all as she went braless under the skimpy top.

Kim’s sister Kourtney Kardashian brought her daughter Penelope and son Mason to the bash; Kris Jenner also attended.

Kim led the way in her low-cut white tank top, which clung to her famous curves. The entrepreneur styled the classic shirt with simple grey sweats that she tied at her waist.

The star, who just announced her new KKW makeup line, wore pink gloss on her lips with rosy blush on the apples of her cheeks.

Kim styled her dark brunette locks in subtle waves, loose and center parted.

The mother of two held hands with the birthday girl, daughter North, as they exited the party.

North decided to keep her look casual as well for her party; the toddler rocked furry cheetah patterned slides with a glittering choker.

The four-year-old chose to wear a graphic Snoop Dogg dress layered over a black T-shirt, showing off her unique sense of style.

North had her tresses pulled back into a high ponytail to finish off her stylish look for her birthday.

Her husband Kanye wore similar sweat bottoms like Kim, even wearing a white shirt as well.

The rapper styled his look with a camouflage patterned bomber jacket.

Their youngest child, Saint, looked like Kanye’s mini me in his orange hued camo T-shirt with coordinating green shorts.

Saint even had shoes with his name emblazoned on the sides.

It was a family-filled celebration for North who was presented with a birthday cake at popular restaurant chain Chuck E Cheese later in the day as Khloe, Kourtney and even Blac Chyna’s daughter Dream joined the party.

In adorable updates posted by her family, birthday girl North can be seen ready to blow out the candles on a delicious-looking sprinkle cake.

Earlier in the day, North was treated to a lavish balloon display with a banner bearing the words, ‘Happy Birthday North’.

By Daily Mail