Birthday party planning just got a little more interesting at the Kardashian home.
On Sunday, Kourtney Kardashian gave birth to her third child with partner Scott Disick, a baby boy. And as it turns out, that's the same day their other son, Mason Dash, turned 5!
Kourtney is the eldest sister in her famous family (followed by Kim and then Khloe).
Kardashian and Disick also have a daughter, Penelope Scotland, who is 2.
But don't fret about Mason: He had his last solo birthday party this year, and it was quite the bash — a "Nightmare Before Christmas" themed celebration held in November, People reported.
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