Kendall Jenner's family took a trip down memory lane for her 21st birthday on Thursday.

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The reality star's mom, Kris Jenner, and sister Kylie Jenner dedicated sweet posts to Kendall on Instagram after celebrating with the model in Los Angeles the night previous.

"Happy 21st birthday my sweet angel, @kendalljenner!!!!! You are so beautiful inside and out. Thank you for being YOU and for blessing us with your kindness, your adorable sense of humor and your love," Kris captioned a collage.

"I am blessed beyond belief to call you my daughter. You make me proud every single day, and I love you so much!!! Happy birthday my beauty!!! #lovemommy #proudmama," she added.

Kris shares Kendall and Kylie with her ex-spouse, Caitlyn Jenner, and is also mom to Kourtney Kardashian, Kim Kardashian, Khloe Kardashian and Rob Kardashian.

Kylie celebrated her sister's birthday by sharing a photo of them dressed up in costume.

"My big sister is 21," she wrote.

"Happy birthday Kenny. My other half. I wouldn't be me if it weren't for YOU. We dreamt about the day when you'd turn 21 & I'd be 19. It came too fast... but who you are and where you are today was beyond my wildest expectations!"

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"You are an angel my supermodel sister. I love watching you live out your dreams. Every Kylie needs her Kendall @kendalljenner," the star added.

Kendall rang in her birthday Wednesday with her mom, sisters and friends at Catch restaurant and Deliliah supper club in West Hollywood.

She started the evening in a plunging black bodysuit and later changed into a $9,000 Swarovski-covered dress.

"The party was totally her style," a source told People of the bash. A massive party is "just not who she is. [She] was super happy all night."

Kendall and her family came to fame on the E! series "Keeping Up with the Kardashians," which is in its 12th season and airs Sundays at 9 p.m. ET.

She is known for her modeling work with Chanel, Balmain and Victoria's Secret.