Kourtney Kardashian gave fans a rare glimpse of her youngest son on Friday.

How Did Kourtney Kardashian Choose The Name Reign Aston For Her Son?

As the 10th season of her family's long-running reality show, Keeping Up With The Kardashians, continues, the youngest of the Kardashians shared a photo of Reign Aston Disick on Instagram.

"Three women and a baby," the 35-year-old reality star captioned the photo, which also included herself and two friends.

Kourtney Kardashian Shares First Photo Of Reign Aston

In less than 10 hours, the photo garnered more than 500,000 likes.

As for how she chose the name Reign Aston for her son, Kardashian recently spoke out.

“I’m never certain [with names] until they’re born,” Kardashian told PEOPLE Magazine. However, just after deciding on the moniker for her third child, Kardashian knew it was the perfect fit. "I love it!"

“I actually had the name on our list with Mason. Then with Penelope, I had it on the list but spelled R-A-I-N,” Kardashian explained.

Now a mother of three, Kardashian is focused on her family's children's clothing line, Kardashian Kids collection.

“We put so much into it and were constantly sending references to each other,” Kardashian said of herself and her younger sisters, Kim and Khloe. “We take a lot of pride in the line and we’re all kind of perfectionists and very detailed oriented."

For more Kourtney Kardashian, tune into Keeping Up With The Kardashians on Sundays at 9 p.m. on the E! Network.