Saint West is growing up so fast!

Kim Kardashian shared a series of new Instagram photos of her and Kanye West's one-year-old son — and he is certainly turning into a handsome young man and resembles his famous parents.

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"Me and my Sainty boo a few months ago," she wrote.

We hope their three-year-old daughter, North West, doesn't get too jealous when she finds out her gorgeous mommy took time to gush over the little guy instead of her.

Kim has been open in the past about Nori having a hard time adjusting to having a sibling.

“Right now, because she's three, it's time to talk a lot about sharing. And North is great at sharing,” Kim explained. “She's still getting the concept of having a brother, though. Like, [Kourtney Kardashian and Scott Disick’s children] Penelope and Reign are her cousins, but Saint is here every day because Saint is her brother," she explained in July.

“I like to bring her in to say ‘good morning.’ She still wants things to be all about her, because she's three! But planting that seed every morning that the day starts with you and your brother, that's how I've been doing it,” Kim said. “And she's getting so much better. I can't wait until they can really start communicating — although once he's big enough to start grabbing her toys, we'll have to get involved in a different way.”

https://twitter.com/kanyewest/status/813848942001659904

And while the reality star publicly struggled with complicated pregnancies, she has yet to officially rule out welcoming a third child with her rapper husband of two years.

“So I’ve come to the conclusion that I just want to explore surrogacy,” she said on a November episode of Keeping Up With the Kardashians.

Scroll through the gallery to see even more photos of Saint!