Rapper Wiz Khalifa and fiancee Amber Rose arrive for the 2012 MTV Video Music Awards in Los Angeles, September 6, 2012. (Photo : REUTERS/Danny Moloshok)

Amber Rose showed off her growing baby bump at the MTV Video Music Awards on Thursday, finally confirming the coming of her first child with fiancé Wiz Khalifa.

'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,” Amber Rose told People magazine.

The 28-year-old star and her 24-year-old fiancé looked glamorous and happy on the red carpet in matching black attires. Amber Rose was dressed in a skintight lace black dress, and embraced her baby bump in front of the cameras.

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"Well, Sway, you know you my brother man, so we had to do it with you first and we had to do it with the whole world, and just let everybody know that we're expecting a beautiful young baby," Wiz told the show’s host, according to MTV.

"We're having a baby!" he screamed.

"You going to have to teach him how to rap and be a real good MC," the rapper said to Sway, revealing his hope for a baby boy.

Last month, Khalifa denied Rose’s pregnancy rumors, saying, ''She will have my baby in life. And you will know when she's pregnant.

But it's not the time now for people to start going crazy.''

At last year’s MTV VMAs, the duo spoke of their desire to wed and have children. Khalifa proposed to Rose back in March.

“She Said Yes!!!” Khalifa tweeted off his excitement.

''I'm superman! I'm going to the best dad and the best performer and the best husband that I can be.''

Now that Amber Rose is pregnant, the couple might tie the knot in October instead of a winter wedding they had initially planned, according to sources.