Happy birthday, Kourtney Kardashian!

The Keeping Up With the Kardashians star turns 39 today and her family members are taking to social media to help her celebrate the special day. Kim Kardashian was one of the first to share a sweet message to Kourtney, along with a photo of the duo on vacation together.

"Happy Birthday to my friend I've had the longest in my life! Wouldn't know what to do without you! Have the best birthday ever!!!!" Kim wrote to Kourtney.

Kourtney's mom Kris Jenner also took to Instagram on Wednesday to share an adorable throwback photo and message to her first born.

"My first born, my gift from God, my amazing precious blessing!!" Kris wrote alongside a pic of herself and baby Kourtney. "You have given me so much joy and love and beautiful immeasurable experiences and memories since the day you were born and I thank God every single day that he chose me to be your mom."

Kris continued, "I'm so proud of you... you are the most amazing mom, sister, auntie and daughter and I love you with all of my heart forever and ever Mommy xo."

Rob Kardashian also posted a throwback photo on Wednesday of Kourtney, Kim and their late father, Robert Kardashian.

"Happy Birthday to my oldest and wisest Sister ! I LOVE YOU so much!!! I am so Thankful for you and God Bless You with another amazing year! Love Bob," he wrote in a Twitter message to his sister.

Kourtney Kardashian, Kendall Jenner, Birthday

Instagram

Kendall Jenner took to her Instagram Story on Wednesday to give a birthday shout-out to Kourtney.

"Happy birthday to this boss bitch!" Kendall captioned a photo of her and Kourtney on a boat in bikinis.

Khloe Kardashian also shared a series of photos and videos on Instagram for Kourtney's birthday.

"In any lifetime I would have found a way to have you in my life forever!" Khloe captioned the post. "I can't imagine life without you! Have the best birthday!! You deserve everything and more! Forever and always I love you!!!"

Kourtney Kardashian, Birthday

Instagram

On Tuesday, Kourtney shared a photo on her Instagram Story of a birthday cake she received from Khloe.

"It's my birthday tomorrow!! thank you," she captioned the picture.

Hours before it officially became her birthday, Kourtney appeared to be having dinner with her boyfriend Younes Bendjima.

She posted photos and videos to her social media of the couple preparing the pre-birthday meal.

On Wednesday, Younes posted a series of cute pics and videos of Kourtney on Instagram Story from trips they've taken together throughout their relationship.

Over the weekend, the duo also spent time together at Coachella, along with Kylie Jenner. Kourtney posted a photo to Instagram on Monday that showed her sitting on Younes' shoulders while watching Beyoncé perform.

Be sure to send Kourtney some birthday love in the comments below!

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