The 'Black and Yellow' hitmaker took to his twitter account to reveal the model accepted his proposal after more than a year together.
In a message accompanied by a picture of the 28-year-old beauty's engagement ring, he tweeted: ''She Said Yes!!! (sic)''
Following the announcement, Amber took to her twitter account to express her joy.
She wrote: ''He has made me the Happiest Woman in the World!!!! (sic).''
The couple got together following Amber's split from rapper Kanye West, and the newly engaged pair have collaborated a number of times.
Wiz features on Amber's debut single 'Fame', while she is set to appear on his forthcoming mixtape 'Taylor Allderdice', which is due for release on March 13.
The 24-year-old hip-hop star recently said he is ''having a great time'' in life and is enjoying ''getting new fans''.
He explained: ''Me, where I come from we made everything on our own. It's a process of just recreating what we already know how to do and just taking it to the next level, and I'm having a great time. I'm getting great new fans and doing new things.''