Penelope Disick might be out of a job soon, given that her BFF, North West, is reportedly growing closer and closer to her new baby brother, Saint West.

"North is loving baby Saint and has been a great older sister during this past few weeks. They sure will have a great bond. It's already displayed between baby Saint and North,” a source tells E! News. "She is turning into a little lady and is very smart.”

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North with her parents, Kim Kardashian and Kanye West.

The source also notes that baby Saint "is looking more and more like North every day."

Just last week, their mother, Kim Kardashian, shared the first photo of one-month-old Saint on her website; in the adorable snap, he's holding hands with his big sis.

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Kim Kardashian West

"She said, 'He's my best friend,’” Kanye West’s wife wrote.

We can’t wait to meet the little guy!