"My two favorite Laker fans 👶🏼🍼🏀, " The Voice coach captioned the pic, adding baby, milk bottle and basketball emojis.
Sources confirmed the couple's pregnancy to ET earlier this month, but the social media post marks Levine's first public statement on his impending fatherhood.
Earlier this month, the 37-year-old singer and Prinsloo went house hunting in Pacific Palisades in Pacific Palisades, California. They looked at a beautiful hilltop home that appeared to have plenty of room for the parents-to-be to grow their brood!
The Maroon 5 frontman shared the photo on Saturday, which showed the 26-year-old Victoria's Secret model wearing an L.A. Lakers cap and proudly showing off her baby bump in a red bikini.