The couple took to their respective Twitter pages to announce to the world their engagement, reported Aceshowbiz.
Deadmau5 first tweeted a photo of a ring and wrote, "I can't wait for Christmas so.... Katherine Von Drachenberg, will you marry me?."
"Changing the diamond to a black diamond FYI. Sorry for the jpg... They'll finish the actual ring soon I hope. I love u D."
Kat, 30, apparently said yes for she tweeted later, "Mi corazon!!! Thank you all for the lovely congratulations! Please excuse me while I go squeeze the hell out of my fiance."
Deadmau5 added later, "I'm engaged and stuff!... 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."
The tattoo artist and the DJ began dating in mid September after meeting at a party. They made public their break up two months later with Deadmau5 writing, "Going to spend a little while screwing my head back on. I guess I'm not cut out for relationships right now."
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However, they were back kissing and holding hands during public outings in November.
Kat was was previously engaged to Jesse James before splitting for good in September 2011. She has also been married once to Oliver Peck whom she married in 2003.