Most girls her age might get a cuddly toy or a doll for the milestone, but they do things differently in the Kardashian-West household.
They had little Nori's ears pierced, and bought her the sparkling studs.
Kim's mother, Kris Jenner, 58, posted a picture of North on Instagram, saying: "Happy 1st Birthday to my beautiful Granddaughter North!!!! You are an angel and I love you so very much!!! #lovebug #pinchthosecheeks."
The earrings were revealed as Kim, 33, and Kanye, 37, took North to the Children's Museum Of Manhattan in honour of her special day – at the same time as celebrating Father's Day.
Kim took to Instagram to post a picture of Kanye and Nori sleeping, with the caption: "This is what life is about! Our baby girl turned 1 today! We played so hard they passed out while we were watching the game! Happy Father's Day to the best daddy in the world!
"The way you love our daughter and protect her makes me filled with so much love! #BestDayEver #Twins #HappyFathersDay #HappyBirthday."