Amber Rose is officially in the family way.

Radaronline.com is reporting that the model and her fiancé, Wiz Khalifa, are expecting their first child together.

A source said while Rose and Khalifa are excited about the upcoming bundle of joy, the pair unexpectedly got pregnant. The two are “really happy to be starting a family together.”

Like all new moms-to-be, the idea of having a baby is definitely a game changer, and it’s especially the case for the voluptuous blonde beauty. The source continues, “Amber’s already had to make some big lifestyle changes, like not smoking cigarettes anymore. As a model, she’s used to having a thin waist, so this is going to be an adjustment for her.”

MediaTakeout, which announced Amber’s pregnancy on Monday, says the model is due in January 2013 and because of that the couple plan to move their wedding date to October 2012.

BET.com is your #1 source for Black celebrity news, photos, exclusive videos and all the latest in the world of hip hop and R&B music.

Click here to subscribe to our newsletter.