It's official: Khloe Kardashian is now a mom!

Baby Thompson Has Arrived

The Keeping Up With the Kardashians star welcomed her baby girl with her boyfriend, Cleveland Cavaliers player Tristan Thompson, Thursday, April 12. This is the first child for the Good American designer but the second child for Thompson as he already has a son, Prince Oliver, from a previous relationship.

The reality star's siblings, Kim and Kourtney, and their mother, Kris Jenner, were reportedly there for the arrival of her daughter. The reality star's best friend, Malika Haqq, was also present for the moment.

Kardashian's daughter is the third girl to join the Kardashian-Jenner clan this year as both of her sisters, Kim Kardashian and Kylie Jenner, also welcomed girls earlier this year. Kim welcomed her third child, Chicago West, via surrogate in January and Jenner gave birth to her first child, Stormi Webster, with her boyfriend, Travis Scott, in February.

In September 2017, news broke that Khloe was with child, but she waited three months before confirming the news. The reality star explained that there were lots of risks and complications and she wanted to get through her first trimester before sharing the news with her fans.

Once she was in the clear, the Strong Looks Better Naked author took to Instagram in December 2017 to reveal that she and Thompson were expecting. The 33-year-old denim designer shared a black and white photo of her and Thompson holding her growing baby bump.

"My greatest dream realized! We are having a baby! I had been waiting and wondering but God had a plan all along. He knew what He was doing. I simply had to trust in him and be patient," Khloe captioned the photo.

Tristan's Cheating Scandal

The news of the baby's birth follows a recent cheating scandal involving Thompson, who was caught kissing another woman over the weekend in New York City.

The Daily Mail released video footage that showed the athele getting up close and personal with the mysterious woman, who was revealed to be Instagram model Lani Blair.

Neither Thompson nor Kardashian has responded to the news, but Thompson was reportedly present for the birth of his and Kardashian's baby.