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Post Malone Expecting First Child with Girlfriend

TMZ.com

Post Malone is about to celebrate a very big milestone ... he and his GF are having a baby!!!

Post tells TMZ ... "I'm excited for this next chapter in my life, I'm the happiest I've ever been, and for since I could remember I was sad. Time to take care of my body and my family and friends, and spread as much love as we can every day."

Sources close to Post say he and his girlfriend celebrated the baby-to-be with a private party for friends and family in Southern California over the weekend.

Post Malone Performance Photos Gallery Launch Gallery POST PERFORMANCE PICS Launch Gallery Gallery Getty

The baby will be Post's first ... the 26-year-old also has a new album, "Twelve Carat Toothache" expected to drop next month -- so ya, lot's of good things for Post on the horizon.

As for Post's girlfriend ... we are told she's not someone who has spent any time in the spotlight, the two have been happy privately building their relationship -- which will soon turn into a family.

Play video content POST ROCKS COACHELLA

Post's been having a ton of fun lately, performing at a Coachella party with his buddy Quavo and hitting some L.A. hotspots for dinner.

Play video content PARTY WITH POSTY

TMZ broke the story -- Post was super sweet to a fan with autism -- who was out celebrating his 21st. The fan's mom told us her son has a hard time speaking, and strangers are sometimes impatient with him ... but Post could not have been nicer.

Congrats on all to come!!!

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