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Happy First Birthday, Mason Dash Disick!

Can you believe how quickly Mason Dash Disick is growing up?
/ Source: E!online

Can you believe how quickly Mason Dash Disick is growing up?

Kourtney Kardashian and Scott Disick's adorable offspring ( who's already walking! ) celebrates his first birthday today.

And of course, the little guy got special blog posts from his mama along with aunts Kim and Khlo in honor of his big day...

PHOTOS: Mason's First Days

"Happy first birthday to my little angel," Kourtney tweeted this morning, with a link to a blog post chock-full of awww-inducing photos of Mase.

Khlo (who's headed to South Africa today with Kim) mused about Mason and what he's added to their family on her blog.

"From the moment Mason was born, we were all madly in love with him. It didn't matter that he couldn't talk, walk, or do pretty much anything LOL, his existence in itself enriched all of our lives in a way we never knew possible," she shared.

Kim wrote about how the little guy has been life-changing, saying; "Words can't express how much little Mase has changed my life. He is such a blessing to our family and watching him grow into a gorgeous little man is so amazing."

And for all those Mason fans out there, good news! You'll get to see more of his cute cheeks starting Jan. 23, when Kourtney and Kim Take NYC premieres right here on E!.

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