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Kim Kardashian Welcomes Baby No. 3: Here’s Everything We Know

There’s a new West in the building!

There’s a new West in the building!

Kim Kardashian and Kanye West welcomed their third child on Monday – a daughter, weighing 7lbs 6oz, according to Kim's post on her app.

The West’s announced last year that they were expecting a third baby via surrogate. A source tells E! News that Kim knows having a newborn is going to be a "big change" but the two are ready.

Kim Kardashian Hits the Ice Rink With Her Kids, and More | Spotted

In related news, here's a look at Northie's evolution before becoming a big sister: