Wiz Khalifa and Amber Rose

Wiz Khalifa and Amber Rose welcomed their first child — a son — on Thursday, the new dad announced on Twitter.

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"Happy Birthday Sebastian 'The Bash' Taylor Thomaz!!! Everyone welcome this perfect young man into the world," Wiz Khalifa, whose real name is Cameron Thomaz, tweeted on Thursday. Hours earlier, the "Black and Yellow" rapper, 25, was ready and waiting to welcome his new offspring into the world and shared a picture of himself in hospital scrubs on Instagram with a caption reading "daddy time."

The couple first announced they were expecting at the 2012 MTV Video Music Awards, when Amber Rose, 29, debuted her baby bump on the red carpet. This is the first child for the twosome, who became engaged last March.