"I don't want you to get older!" Khloé Kardashian wrote on Instagram
Credit: Araya Diaz/Getty Images

Kylie Jenner is 19, and her family can’t believe how fast she’s growing up!

The Kardashian-Jenners wished the birthday girl well on Wednesday with sweet messages and funny videos of the teen.

Proud mom Kris Jenner, 60, was among the first to spread the love on the big day with a collage of throwback photos of her daughter.

“I can’t believe my baby girl is 19 today!!!! @kyliejenner I’ve watched you grow into the most loving, kind-hearted, funny, motivated, beautiful young woman and I couldn’t be prouder of you!!” the post began. “There are so many amazing adventures ahead for you, my sweet girl, this is just the beginning!!! I can’t wait to see what life has in store for you. I wish you the most amazing day today. You are my heart, a true blessing and I love you beyond words!!!!! #birthdaygirl #love #proudmama #blessed #happybirthdaykylie.”

Khloé Kardashian, 32, wished her younger sibling a great day with a video of the girls cracking up as they play with a Snapchat filter.

WATCH: The Top 5 Reasons We’re Obsessed with Kylie Jenner

“My baby girl is about to be a year older,” the reality star captioned the video, complete with sad face emoji. “If anybody knows me, they know my obsession for my little sisters Is real. I don’t want you to get older! Why am I getting so sad? It’s almost birthday time.”

Kim also shared a heartfelt post for Kylie on her website and app that read, “Happy 19th birthday, Ky!!! Even though you are the youngest among us, I am constantly amazed by your maturity. I am always learning from you and inspired by your dedication to your business. You are so true to yourself and I love that!”

“You have always known exactly what you wanted and gone for it, and I love seeing your dreams come true,” it continued. “I found some old pics of us just hanging out, so happy we have all these memories to share. I hope you have the best day! Love you!”

Kim also shared a throwback photo of the two via Instagram, with an additional loving message.

As for her sister Kendall, she wrote a sweet message on her website and app that read, “Happy birthday, Kylie! I hope you have the best day!!! Even though we’re so different, I love our special bond. You’ll always be my baby sister. Enjoy your last year of being a teenager!”

The makeup mogul also shared a snap in her “birthday suit” – a red one-piece bathing suit that complements her fiery new hair color as well as a birthday video where she sang, “Happy birthday to me.”

Nineteen is already proving to be a good year for the youngest of the Kardashian-Jenners. Jenner’s boyfriend, rapper Tyga, surprised her with an early birthday gift of a new car over the weekend.

The birthday girl shared a video on Snapchat where she films the black Mercedes-Benz Maybach (which starts at around $189,000) and gushes over her new present. “Happy early birthday to me,” she said, adding, “Yay! I love you, T.”

He also made sure to send her a little love on her actual birthday as well.

Keeping Up with the Kardashians airs Sundays (9 p.m. ET) on E!