Kourtney Kardashian is celebrating her daughter Penelope Disick's 6th birthday.

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The 39-year-old "Keeping Up with the Kardashians" star marked the occasion Sunday by dedicating a sweet post to Penelope on Instagram.

Kardashian shared a slideshow of photos of Penelope, her daughter with ex-partner Scott Disick, in Portofino, Italy.

Penelope wears a floral dress, cowboy boots and wide-brimmed hat in the picture.

"My little birthday ladybug makes my heart incredible full every day," Kardashian gushed in the caption. "So in awe of her."

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Kardashian's sister Kim Kardashian and mom, Kris Jenner, also wished Penelope a happy birthday online.

"Happy 6th Birthday my baby girl Penelope!" Kim captioned a photo of Penelope with North West, her daughter with Kanye West.

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"I love you so much you have no idea! But P, what's the tea you're spilling here?!?!?!"

"Happy Birthday to my beautiful granddaughter Penelope who turned 6 today!!!!!" Jenner wrote. "P you have brought such love and joy into our world and I love every single second of watching you grow up!!!!!"

"Thank you for every single memory and for all of the joy and laughter you bring to us every day. I love you so so much my precious P #proudgrandma #love #mybabies," she added.

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Kardashian and her family feted Penelope and North at a unicorn-themed joint birthday party in June.

Kardashian is also parent to two sons, 8-year-old Mason and 3-year-old Reign, with Disick.