Maksim Chmerkovskiy and Peta Murgatroyd are going to have a boy, reports Us Weekly.

The outlet says that multiple sources have confirmed the news after the couple posted a pretty telling Instagram pic on Thursday, July 14.

The dancing duo, who announced the baby news back in May, majorly hinted about their wee one's sex at Peta's 30th birthday party earlier in the week when the gorgeous gal posted a photo of the couple kissing behind a tired birthday cake decorated with blue frosting and tiny blue baby booties. The cute photo was captioned, "Cake and Kisses for 3."

🎂 Cake and Kisses for 3 @maksimc 😍

A photo posted by Peta Murgatroyd (@petamurgatroyd) on

We can assume that the cake was a gift from her super sexy fiance since it had "Happy 30th Peta" and "I love you both!" written on it.While the lovebirds didn't come out in say it with the cake -- we can pretty much infer that they're having a baby boy.

And it wasn't just on the cake that Maks was wishing his pregnant bride-to-be a birthday message, the 36-year-old also took to Instagram to write a sweet message.

Along with a selfie of the duo, the Ukrainian dancer wrote, "Happy birthday @petamurgatroyd I can't wait to tell our kids stories about these pictures and I don't know how you manage to get hotter every day, but I am infinitely more attracted to you now then ever before! And 30s are so much better than 20s! Trust me … I know #dirtythirtyneverlookedbetter."

The pro dancers got engaged in December 2015, after an on and off romance. Peta and Maksim first got together back in 2012, but split in 2013, and then reunited in early 2015.

Maksim proposed in Miami, Florida during a performance of "Sway: A Dance Trilogy." The dancer got down on one knee and said in front of the crowd, "I'm in love with you and I want to be in love with you for the rest of my life. Will you marry me?"

Obviously Peta, who just won season 22 of "Dancing with the Stars" with partner Nyle DiMarco, said yes -- and it looks like things have been going swimmingly since then!