North responded to Kim's request with a simple “Okay!”
Kardashian also posted a sweet message to her little girl on Twitter, saying, "Northie I love you so much I can't even explain it! Happy Birthday to my favorite mermaid!!!”
Kim's sisters Khloé Kardashian, Kendall Jenner, and Kylie Jenner, all posted birthday wishes for North on their own websites. Khloé wrote, “Happy birthday to my niece, North! You are the sweetest little girl and such an awesome big sister to Saint. Auntie KoKo loves you to the moon and back!!!”
Kendall told her niece, "North, I can't believe you're already three! It's crazy how quickly you're growing up, but it's so amazing to see. You're such an energetic, outspoken and funny kid. You're also the chicest little lady I know (along with P, of course). Happy birthday — I love you!”
Kylie added, "Happy birthday to my beautiful niece, North! You're so funny and smart and it's really special to watch you grow up.”
Kanye has not commented on North's birthday, but did make a big tour announcement the day before. He also dropped a new song, "Saint Pablo,” to celebrate the new 40 city tour.