"Where there were three Stagliano's, now there are four! Welcome to the world Hunter James. Oh also @emilystag is a powerhouse of a Mom! So proud of her and SO in love with her," the star captioned the post.
Emily was due to give birth in July. Stagliano told fans as much while announcing his wife's second pregnancy in January.
"Well guys, the Stag Clan is growing from 3 to 4 in July, and it's a BOY! We're super pumped for B to have a little buddy for life," he said at the time.
Stagliano and Emily celebrated their fourth wedding anniversary in May. Stagliano marked the occasion by dedicating a sweet post to his wife on Instagram.
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"Celebrated 4 years of marriage with @emilystag last night. I am the luckiest guy I know," he wrote.
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