There's a wedding and a little Wiz on the way!

Before they officially welcome their first child, Wiz Khalifa and his pregnant fiancee Amber Rose will be man and wife -- in the eyes of the law, at least -- he told NYC radio station Hot 97 during an interview Tuesday, Nov. 27.

PHOTOS: Most stylish music stars

"We're gonna get, like, licensed marriage, in a couple weeks we'll have that done," the Pittsburgh-bred rapper, 25, shared, adding that they'll properly celebrate after Rose, who is currently in her third trimester, has given birth.

"When you have the ceremony, that's when you can invite the family," he explained. "She can fit into a dress and then like nieces, nephews. If we have a daughter one day, she might wanna give the dress to our daughter, but if she's pregnant then she can't do that."

PHOTOS: Chic celeb maternity styles

PHOTOS: 2012 VMAs -- what all the stars wore!Read more: Follow us: @usweekly on Twitter | usweekly on Facebook

Another perk of postponing the bash? The new mom, 29, will be able to properly toast her big day.

"She wants to get drunk," Khalifa joked.

This article originally appeared on Wiz Khalifa, Amber Rose Will Be Legally Wed "In a Couple Weeks"