Amber Rose, a model and Smirnoff spokeswoman, shared the first photo of her growing stomach on twitter with her followers.
"Our lil wizbud Is growing so fast ;-)" she tweeted, along with a picture of her in pink underwear, a floral dress, and glasses.
Earlier this month, Rose, 28, confirmed pregnancy rumors at the MTV VMA Awards. She is engaged to "Work Hard, Play Hard" rappper Wiz Khalifa, 24.
"We're expecting a beautiful lil baby -- me and Amber. We're so excited. We're having a baby!" Khalifa told MTV's Sway Calloway on the red carpet.
"Thx 4 all the Love my Rosebuds & Rosestuds I love u guys so much we're about to have a lil #WizBud join our Rosebud fam Yay!! :-)" Rose tweeted that evening.
While there was speculation, Rose did not admit to being pregnant until the awards show, wearing a tight black dress that accentuated her stomach. Khalifa made sure to hold her baby bump in photos as well.
Rose told People magazine, "We do know the sex, but we're [keeping it private] for now. We just found out two days ago, so we're super excited.'"
Rose first dated rapper Kanye West, before accusing him of cheating on her with his current girlfriend, Kim Kardashian.
After Rose and West broke up, she found love with Khalifa, and got engaged in April of this year.
This will be the couple's first child.