Kim Zolciak's baby boy made his reality TV debut last night -- when he was only an hour old!

After spending most of the season in bed, Kim finally gave birth on last night's "Real Housewives of Atlanta" -- where little Kroy Jagger Biermann Jr. made his first appearance on television.

"You got your mom's lips ... the rest is your dad," Kim said to the newborn after popping him out -- with Kim's hubby, Kroy, adding the baby was "one of the most beautiful things I've ever seen."

It was a pretty cute moment for Kim and her family, with her daughters coming in to meet little K.J. for the first time.

Check out the baby's introduction to reality TV cameras above!

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