Daphne Oz's little boy is getting so big!

The 30-year-old The Chew star took to Instagram on Sunday, Feb. 21 to share a cuter than cute new photo of her smiley infant son, Jovan "John John" Jovanovic.

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happy 4 months to me!! 🎂 wearing my sister's old sleep sack and loving it. note from mama: guys, I didn't want to put up a big post about this because I really, truly don't care if some of you think I still look "too pregnant" to wear anything other than a sleep sack myself. but I feel compelled to say something because it makes me so sad to think there are those of you out there who believe that a woman's body is only beautiful and worth looking at if it is the toned and taut lingerie models that are all over Instagram. if that's all you want to see, you are welcome to unfollow me. I still have weight to lose, and I am certainly not disparaging the hard work it takes to be in great shape. of course I'm excited to get there!! but I am not prepared to be in hiding until I do, or to only put up photo shopped versions of myself and make my progress look different than your own. there is nothing "inappropriate" about continuing to feel good in my own skin, even while I work to feel better. please take a good, long look at yourself in the mirror and try to be a little more loving. you are everything.

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"Happy four months to me! ? Wearing my sister's old sleep sack and loving it," Daphne captioned the sweet snapshot.

RELATED: Daphne Oz Sports a Bikini on the Beach Just One Month After Giving Birth — See the Pic!

The TV star and her husband, John Jovanovic, welcomed baby Jovan in October 2015. The couple — who married in 2010 — are also parents to a nearly two-year-old daughter, Philomena "Philo" Bijou Jovanovic, whom they welcomed in February 2014.

Click through the gallery below to see more of Hollywood’s cutest kids!