Wiz Khalifa and Amber Rose are now proud parents!

E! News reports that the couple welcomed a bouncing baby boy Thursday whom they named Sebastian "The Bash" Taylor Thomaz.

Wiz later tweeted, "Happy Birthday Sebastian 'The Bash' Taylor Thomaz!!! Everyone welcome this perfect young man into the world."

Rose also shared her enthusiasm with the world, tweeting "Happy Birthday to our baby boy Sebastian 'The Bash' Taylor Thomaz! I'm so happy u guys I fell in love all over again! :-)"

The couple have known the baby's sex since shortly before their red carpet appearance at the MTV Video Music Awards back in September, but they decided to keep it under wraps until the big day.

Khalifa and Rose have been engaged since March.