Reality Tv star-turned-fashion expert KRISTIN CAVALLARI is celebrating after giving birth to her second son.

The 27 year old and her husband, American football quarterback Jay Cutler, welcomed baby boy Jaxon Wyatt Cutler to the world on Wednesday (07May14).

The Hills star announced the happy news on Instagram.com with a photo of a blue-striped baby hat and hospital bracelet wrapped around a pair of suede booties.

She also took to Twitter.com and wrote, "Welcome Jaxon Wyatt Cutler. 7lbs (pounds) 11oz (ounces) 5/7/14."

The newborn joins the couple's 19-month-old son Camden.

Cavallari confirmed reports she was expecting her second child in October (13) and unveiled the baby's gender in February (14), tweeting, "We couldn't be more excited!"

The star wed the Chicago Bears quarterback last summer (Jun13).