Amber Rose, Wiz Khalifa Welcome Baby Boy!

USMagazine, Thursday, February 21, 2013, 2:20pm (PST)

Amber Rose and Wiz Khalifa are officially first-time parents! Khalifa, 25, confirmed on Twitter that fiance Rose, 29, delivered their baby boy, Sebastian Taylor Thomaz, on Thursday, Feb. 21.

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

The model, who became engaged to Khalifa in March 2012, confirmed her pregnancy at the 2012 MTV Video Music Awards in September.

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The first-time mom documented her growing baby bump on Twitter, and shared her plan to have a natural delivery.

"Today was the first day of my home birthing classes," she tweeted Jan. 13. "No meds, no hospital, just the privacy of my own home. I'm so excited for this experience!"

During an interview with Los Angeles radio show Big Boy's Neighborhood (via the San Francisco Chronicle), Khalifa said he planned on being very hands-on during the delivery.

"We're gonna have a midwife and a doula at the crib and she's gonna be in a pool and it's gonna be like a relaxing environment," he explained. "And when she's ready. she's gonna tell me when to stick my hands down there and I'm gonna pull the baby out." 

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In addition to being prepared for the birth, the couple had their son's name picked out early on.

During an interview Jan. 29 with L.A.'s Power 106, Rose and Khalifa said they chose a "total boss name."

"It's funny because I came up with the name for our boy and immediately he came up with a rapper [nickname] for him," Rose said. The new parents also have a girl name picked out for the future.

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"He thought we were having a girl as soon as I got pregnant and then we had the girl's name all ready," Rose (who dated Kanye West from 2008 to 2010) explained. "We're not gonna say that either because we may have the girl next."

This article originally appeared on Usmagazine.com: Amber Rose, Wiz Khalifa Welcome Baby Boy!