The Canadian DJ proposed to the tattoo artist - who he split from in November after a two-month romance - on Twitter on Saturday (15.12.12) and the brunette beauty said yes.
Deadmau5 - whose real name is Joel Zimmerman - tweeted: ''I can't wait for Christmas so.... Katherine Von Drachenberg, will you marry me?''
The tweet was accompanied by a picture of a diamond ring flanked by two skulls, with text on the image explaining that the musician planned to get the stone switched.
He wrote: ''Changing the diamond for a black diamond FYI. Sorry for the jpg... they'll finish the actual ring soon I hope. I love you. (sic)''
Kat replied with a series of exclamation marks, prompting her new fiance to write: ''Holy f***ing s**t. im engaged and stuff! (sic)''
Kat wrote: ''Mi corazon!!! Thank you all for the lovely congratulations. Please excuse me while I go squeeze the hell out of my fiance!''
Deadmau5 added: ''Thanks for the well wishes and support from the horde and everyone else!
''brb while i spend the rest of my evening with my future wife :) (sic)''