X17 told you first!

Khloe Kardashian is pregnant and expecting her first child with boyfriend Tristan Thompson, multiple outlets report. The happy news comes just days after sister Kylie Jenner's pregnancy was revealed, and the two are both reportedly four months along and due around the same time. As if that wasn't enough, Kim and Kanye's surrogate is due in that time frame, too! It really is a KarJenner baby boom!

TMZ reports the Revenge Body star, who struggled with fertility issues during her marriage to Lamar Odom, conceived naturally. She and her NBA star beau don't know the sex of their unborn child yet.

"Yes, Khloe and Tristan are expecting and they are absolutely thrilled. This isn’t something they were in a rush to announce to the whole world, and it’s only been in just the past week or so that they’ve felt comfortable telling most of their inner circle. Things were complicated a bit by Kylie’s announcement as they don’t want to be seen as intruding on that moment for her but it is now reaching a point where Khloe doesn’t want to be openly lying to people, and just staying quiet isn’t going to work anymore," a source dished to People.

"This is something Khloe has wanted for years and years and yet it’s more than that: she didn’t want it unless she was in the right relationship for it. She never let it happen with Lamar, intentionally, and she never considered it with James or French or anyone else she has seen. But this is such a wonderful moment for her: not only is she going to be a mother, she is going to be raising a child with a man she truly loves. Everyone is over the moon for them both," the source added.

We caught Khloe looking preggo (pic above) while visiting a laser hair removal salon with Tristan on September 16, and we noted that it appeared she had a bun in the oven. Best to never doubt our eagle eyes! We also photographed her spending the day with Kourtney, Kim, Kanye and their kids (pic below) this past Saturday, and she tried to hide her baby bump under a black hoodie, but we could still see it!

We seriously couldn't be happier for her. She's going to be such an amazing mom!