From the looks of it on Kim Kardashian's Instagram, Saint West is already a really good big brother to little sister Chicago. The reality star posted this sweet picture yesterday:

instagramView full post on Instagram

“Sometimes we all need hugs ❤,” she wrote in the caption as Saint, 2, cuddled his little sister Chicago, 4 months, while wearing Mickey Mouse pajamas. And sometimes life is really hard but this picture is very good and pure and a reminder of all good things in the world, okay? Okay. I mean, Mickey Mouse PJs!

Kim went on Ellen last month and said that Saint's role as a big brother has come really naturally to him. “He’s nicer than [North], I will say that,” the Keeping Up With The Kardashians star said. “He loves his little sister. He’s so sweet with her. I always have to watch out for him. He smothers her, and he has this really big hair so he just jumps in her crib.”

Kim posted this funny picture of North, too. Can't believe she grew so much so quickly!

And even though Kim gives her a hard time, she said North is really sweet with Chicago and is good at being the big sister to both of them.

“When I was coming to New York, I was like, ‘Okay, you’re going to be the woman of the house,’ and she was like, ‘Okay, Saint, do this,’” Kim said in an appearance on Live with Kelly and Ryan this month. “She was bossing everyone around.”

BTW, in that same interview, Kim said she'd totally consider having another baby, so cheers to more Kardashian Kids coming our way!

Follow Emma on Instagram.