Khloe Kardashian has posted pictures of her and Tristan Thompson's son, who they welcomed via surrogate in late July, for the first time on social media.  

The adorable pictures of their daughter True Thompson, 4, cradling her little brother were uploaded on the Good American founder's Instagram Stories on October 30, the day before Halloween. 

True is dressed as Owlette from the Disney Junior series PJ Masks. 

The unidentified 3-month-old baby boy is dressed in a soft Pottery Barn Kids Tigger costume and a pair of Nike baby boots.  The picture does not show his face.

The baby's Instagram debut comes more than a month after The Kardashians' season two premiere on September 22, when fans got a brief glimpse of him.  

In the episode, Kylie Jenner, Khloe's sister, and mom Kris Jenner FaceTime with their newest member. 

True refers to him as "Snowy," while the founder of Good American observes that the child is still known only as "No Name Johnson." 

A month before Khloe discovered the NBA star had fathered another kid with Maralee Nichols, Khloe's spokesperson announced in August that she and Tristan were growing their family.

"Ever since December, it's been this dark cloud looming over me," Khloe said in a confessional during the premiere.  

"Every single day I've been feeling depressed and sad. And now that my son is here, I get to move on and I get to enjoy. It's almost like I get to close that chapter and be done with this trauma and put it behind me."