Rapper Wiz Khalifa and his model girlfriend Amber Rose are to wed.

The Black and Yellow hitmaker has announced the news of the pair's engagement on Twitter.com, posting a photo of his new fiancee's ring.

He writes, "She Said Yes!!!"
 
And Rose shared her excitement, adding, "He has made me the Happiest Woman in the World!!!!"
 
Rose, who previously dated Kanye West, began courting Khalifa following a meeting at a California gym in 2010.