July 28, 2016 11:15 PM

Say cheese!

Holly Madison‘s unborn son already knows how to smile from cheek-to-cheek as seen in the mother-to-be’s latest Instagram photo.

The pregnant star, who is due in August, shared an adorable sonogram of her baby boy on Thursday along with the caption, “Can you see the smile? #babyboy #profile.”

Jason LaVeris/FilmMagic

In January, Madison, 36, and husband Pasquale Rotella shared with PEOPLE exclusively that they were expecting their second child. The couple already have 3-year-old daughter Rainbow Aurora.

With her due date coming any day now, the former Girls Next Door star is optimistic about becoming a mother of two.

RELATED VIDEO: You’ll Be Shocked to Find Out Why Holly Madison Is Nervous to Have a Baby Boy!

“Some people will tell me that once you have your second baby, it’s just as easy as one,” she explained to PEOPLE. “Then a friend texted me after I announced my pregnancy [to say], ‘Watch out, two is like three!’ and I’m like, ‘No, don’t tell me that!'”

–Karen Mizoguchi

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