It's a boy for Wiz Khalifa and Amber Rose!

Wiz Khalifa and Amber Rose are the proud parents of a baby boy, who was born on Thursday afternoon.

"Happy Birthday Sebastian 'The Bash' Taylor Thomaz!!!," Khalifa posted on Twitter. "Everyone welcome this perfect young man into the world."

Khalifa, whose real name is Cameron Thomaz, hinted that something was up earlier in the day when he tweeted a photo of himself in surgical cap and mask, along with the message, "Daddy time."

The couple knew the sex of the baby back in September, when they announced the pregnancy on the MTV Video Music Awards red carpet, but they weren't sharing.

They have been engaged since March 2012.