Congratulations are in order for Biggest Loser champ Olivia Ward — she's just become a first-time mom!

The 39-year-old and her husband Ben Ward welcomed a baby boy named Harper Ellis Ward on Friday August 14 and quickly shared their news with Instagram.

Posting a sweet photo of herself giving her new son a cuddle, Olivia wrote, "It is with overwhelming joy @benwardmusic and I would like to introduce our son Harper Ellis Ward. Born 8-14-15 weighing 8 lbs 6 oz. We couldn't be more grateful to God for this amazing gift!"

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HAPPY BIRTHDAY to the best thing that ever happened to my life!! @benwardmusic I don't know what I ever did to deserve you, but I'm so blessed to be your wife!! I'm so thankful you were born…here's to the BEST year yet!!! Love, Your Old Lady xo

A post shared by Olivia Ward (@theobird) on

Olivia, who won season 11 of the NBC weight loss show after dropping an incredible 129 pounds, announced that she was expecting back in February after a struggle with fertility issues, telling Us Weekly: “My husband Ben and I are so thrilled to be expecting."

Since her big win, Olivia has become an instructor for Soul Cycle in New York.