Rob Dyrdek's first child is due in just four months.

Earlier this week, Bryiana Dyrdek, who married the Ridiculousness star last September, shared a photo of her growing baby bump on Instagram, revealing she's more than half way through her pregnancy.

"I'm not perfect, Little One, but I promise to be the best Mommy I can possibly be because I love you so much more than just to the moon and back!" Bryiana captioned the photo. "5 weeks vs. 5 months #EveryDayIsThanksgiving."

On day prior, Bryiana shared a throwback photo from her and Rob's engagement, which took place during Disneyland's Aladdin show.

"365 days later and I'm still soaring, tumbling and freewheeling in these unbelievable sights and indescribable feelings," Bryianna wrote. "No one to tell us no or where to go or say we're only dreaming.. I love this whole new world with you @robdyrdek."

A photo posted by Bryiana Dyrdek (@bryianadyrdek_) on Apr 23, 2016 at 11:51am PDT

At the time Rob and Bryiana first announced they were expecting a baby boy, Rob gushed over the news on Instagram.

Along with a sweet photo of the two of them, as well as an elaborate display of balloons, Rob wrote, "I love @bryianadyrdek_ in so many ways and on so many different levels . I could never create the words to express how deeply and truly I love her and us.When you have a forever love so great the ultimate way to express it is by creating a child together .I am so happy to announce my beautiful wife is pregnant with our first child.We are so blessed ,so happy and look forward to bringing an amazing young boy into this world."

While Rob has been fairly silent in regard to his baby news since his announcement was made, his wife has been much more vocal and often shares photos of her pregnancy as well as notes to fans about her excitement.

Although Rob and Bryiana haven't yet revealed when their baby boy will be born, he should arrive sometime in August.

For more on Rob's romantic proposal to Bryiana, watch the impressive video below.

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