Kim Kardashian and Kanye West are now a happy family of six.

Their baby boy has officially arrived via surrogate, the reality star confirmed on Twitter on Friday afternoon. “He’s here and he’s perfect!” the new mom of four tweeted. According to the star’s rep, the baby was born on Thursday, weighing six pounds and nine ounces.

The couple has not yet shared the little one’s name, but fans are excited to learn the moniker they choose.

It was reported that the surrogate had gone into labor on Thursday. Kourtney Kardashian also spilled the beans on Friday’s episode of The Ellen DeGeneres Show. Kris Jenner was a guest on the show, and the Poosh founder surprised the momager by bringing out six of her grandchildren. She also let her know there was another one literally on the way.

“My mom doesn’t even know this, but Kim’s surrogate went into labor,” Kourtney revealed. “So, she’s at the hospital.” Kris, who was completely shocked by the news, said, “No! What are we doing sitting here?! Come on, Ellen!”

Kim and Kanye announced they were expecting their fourth child in January, nearly a year after they welcomed daughter Chicago West.