The Black and Yellow hitmaker, real name Cameron Thomaz, proposed to Rose early last year (12), months before they confirmed rumours they are expecting their first child at the MTV Video Music Awards in September (12).
Khalifa previously admitted the couple was planning to wed in a simple courthouse ceremony before Christmas (Dec12), and now it appears the nuptials have taken place.
Rose let the happy news slip during a brief chat with Tmz.com in Los Angeles on Tuesday (15Jan13), when a videographer gifted her with a Teenage Mutant Ninja Turtles ice cream bar.
Referring to the hip-hop star as her spouse, she said, "My husband loves Ninja Turtles! That's really cute, thank you."
The expectant parents have yet to officially announce they're man and wife.
In December (12), Khalifa told New York radio station Hot 97 he and Rose were planning to have two ceremonies - a low-key one to make their romance official and a bigger bash for family and friends in 2013, after Rose gives birth - so she can wear her dream wedding dress.
He told DJ Angie Martinez, "We're gonna get, like, licenced marriage, in a couple of weeks we'll have that done.
"When you have the (big) ceremony that's when you can invite the family. She can fit into a dress and then... 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."