Last month we learned that Kayne West and Kim Kardashian were expecting a second child, and yesterday, in a Father’s Day Instagram, we learned that it would be a baby boy!

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Precious moments like this when we were traveling on tour with you are what I live for. You're such a good daddy to North & you will be the best daddy to our new son too! 👨‍👩‍👧‍👦

A post shared by Kim Kardashian West (@kimkardashian) on Jun 21, 2015 at 8:58pm PDT

The baby boy will join Kayne, Kim, and daughter North to become the fourth member of the family.

People tweeted about the news on Twitter.

The baby is said to be due in December. Until then, here are some adorable photos of the couple’s first baby, North.

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Happy birthday to my sweetest Minnie Mouse! Thank you Disneyland for the most amazing day! I will post more pics later today was a busy day!

A post shared by Kim Kardashian West (@kimkardashian) on Jun 15, 2015 at 8:53pm PDT

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"No daddy's it's me necklace"

A post shared by Kim Kardashian West (@kimkardashian) on Jun 12, 2015 at 12:31pm PDT

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Ballet in Balmain

A post shared by Kim Kardashian West (@kimkardashian) on May 28, 2015 at 11:52am PDT

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Minnie Mouse 🎀

A post shared by Kim Kardashian West (@kimkardashian) on May 17, 2015 at 1:27pm PDT

Ugh. Too cute.