Kourtney Kardashian Celebrates 39th Birthday Early With Help From Sisters Kim and Khloe

Kourtney Kardashian rocks LBD
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The eldest Kardashian turns a year older on Wednesday.

The birthday celebrations have already begun for Kourtney Kardashian!

The Keeping Up With the Kardashians star’s little sisters, Kim Kardashian West and Khloe Kardashian, threw her an early 39th birthday bash.

Kourtney took to social media on Tuesday to share a picture of a pretty pink cake lit with two gold candles that was part of the party.

"It's my birthday tomorrow!! Thank you @khloekardashian," the mother of three wrote on her Instagram Story alongside the tasty dessert.

Decorated with pink and white roses and an array of delicious looking berries, the sweet treat had the words “Happy birthday Kourtney” spelled out in frosting and was surrounded by pink plush toys. 

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She also received mini donuts that spelled out "Happy Birthday Kourtney."

Already excited to celebrate turning 39, Kourtney also posted an Instagram pic of her and Kylie Jenner from Coachella, where they're hugging while laughing.

"It’s my birthday tomorrow," the birthday girl wrote. 

The celebration came after a source told ET that Kim and Kourtney, along with Kylie Jenner, had flown to Cleveland, Ohio, to be with sister Khloe Kardashian as the new mom enjoys time with her newborn baby daughter, True, amid cheating allegations against her boyfriend, Tristan Thompson.

Kim and Kourtney previously rushed to Cleveland to be by Khloe’s side for True’s birth but returned home to Los Angeles, California, shortly after.

Meanwhile, Kourtney is looking hotter than ever, judging by recent bikini snaps from a Turks and Caicos vacay with Kim.See more on the pair’s sexy beach holiday below.