The Maroon 5 frontman and the Victoria’s Secret model welcomed first child Dusty Rose into the world last September.
Announcing the news in a post on her Instagram page, 28-year-old Prinsloo shared a photo of herself showing off her baby bump in the mirror.
The model simply captioned the photo: “ROUND 2.”
Prinsloo has taken a year off from modelling while looking after Dusty, but was recently confirmed to return to the Victoria’s Secret runway this November.
Rock star Levine, 38, started dating Prinsloo back in May 2012 and the pair tied the knot two years later in July 2014.
Just last month Prinsloo opened up about her desire to expand their family as having a baby had given her “next-level love.”
“I love Adam, and when you get married and you fall in love with someone, you think that there’s no greater love than that love,” she told People. “And then you have a baby, and it’s just next-level love.”
Levine added: “I think for both of us, we’re just so obsessed with being a family and having a family — seeing this next step in our life.”