AceShowbiz - Formula One racing driver Jenson Button is to become a first-time father, after announcing that his fiancee Brittny Ward is pregnant with the couple's first child.

The 38-year-old sportsman shared the happy news with his fans on Instagram, posting an ultrasound snap of the tot and writing: "Brittny & I are Delighted to announce the new edition to the family currently having his first seat! Look how comfy he looks! #babybutton."

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Brittny & I are Delighted to announce the new edition to the family currently having his first seat! Look how comfy he looks! 😍👶🏼 #babybutton

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A post shared by Jenson Button (@jensonbutton_22) on Jan 17, 2019 at 5:35pm PST

The pregnancy comes after Jenson and former Playboy Playmate Brittny got engaged last June.

The pair started dating months after Jenson's marriage to model Jessica Michibata ended in late 2015. Jessica has also moved on from the marriage, and gave birth to her first child - daughter Joy - in October 2017.