The family took the pint-sized princess to Chuck E Cheese to celebrate the occasion, and it looked like she loved it.
But besides the birthday party, North's family took to social media to wish the 4-year-old a happy birthday.
While her dad is still swearing off social media, her mom, grandma and two of her aunts posted sweet tributes to the birthday girl.
The posts feature never-before-seen photos of North taken over the last few years and she looks as adorable as ever. Plus, each family member paired their photos with kind thoughts on Kim K's oldest child.
Kim was one of the first to share her love for North, as expected.
She shared a candid photo of the two together that feature Kim with a glowing smile as she looks at her daughter.
"My baby girl turned 4 years old today! She's my light & my everything!!! I love you to the moon & back North," Kim wrote.
To top that off, Kim and Kanye got North a Pomeranian puppy. Kim has taken to Snapchat to show off the family's latest addition in a series of videos.prevnext
Happy birthday to our beautiful, funny, smart little love bug, North. You bring so much light to our lives and I am blessed beyond words to have you as my granddaughter. It brings me so much joy to watch you grow up to be sweet and kind and loving... I love you so much my precious angel girl...Lovey xo
Kris Jenner has one of the more touching tributes to North on her birthday.
The proud grandma posted six cute shots of her granddaughter complete with a caption about how much the little girl means to their family.
"Happy birthday to our beautiful, funny, smart little love bug, North," she wrote. "You bring so much light to our lives and I am blessed beyond words to have you as my granddaughter. It brings me so much joy to watch you grow up to be sweet and kind and loving... I love you so much my precious angel girl...Lovey xo"prevnext
North's aunt Kourtney had an absolutely adorable candid shot to share on the special day that will surely embarrass North when she gets older.
North is seen brushing her teeth with a pair of pink glasses that are way too big for her head. To top that off, she's wearing a long pink Jem and the Holograms T shirt.
The shot was presumably taken while North was staying over at Kourtney's for a slumber party with her three cousins.
"Happy Birthday to my Northie angel slumber party unicorn mermaid girl," Kourtney wrote.prevnext
Last but not least, Kim's half-sister Kylie Jenner made sure she was in on the birthday action with a never-before-seen shot of her own.0comments
In the photo, which has more than 3 million likes, North is seen smiling ear-to-ear as she gets out of a car. Kylie has sure the capture North's giggling face perfectly, and it will surely be one of North's favorites when she gets older.
Kylie simply captioned the photo, "happy birthday to this cutie."prev