"Happy Birthday!!!" Wiz Khalifa wrote on Twitter. "Everyone welcome this perfect young man into the world."
The pair welcome a son -- Sebastian Taylor Thomaz. Earlier, Khalifa uploaded a picture to Instagram of himself dressed in hospital scrubs, presumably to help deliver the baby.
"Daddy time," he captioned under the photo.
This ends what at times felt like the longest pregnancy in history. Seriously, it did seem like Rose was pregnant for some time. Then again, in Internet time, anything longer than a few hours seems... well... impossibly long.