A desperate Miley Cyrus fan has threatened to kill their cat if the star doesn't return to Twitter.

The 16-year-old singer-and-actress left her supporters disappointed earlier this month when she announced she planned to stop using the social networking website and now one supporter has issued the 'Hannah Montana' star with a chilling ultimatum in a bid to get the teenager back online.

The unnamed fan wrote on Miley SaveFuzzy.com: "The other day I asked myself: 'What can I do to bring Miley back to Twitter?' Fan video? Petitions? Letters?

"That never works. Heck, Miley even made her own video about never wanting to use Twitter again. Then I looked at my cat, Fuzzy, and I realized, maybe Fuzzy can help.

"Fuzzy can make the ultimate sacrifice for this cause. It was very difficult for me, you see, as I sincerely love Fuzzy. But my mind is made up. I could always get another cat, but nothing can replace Miley's tweets for me!"

The website founder has given Miley a deadline of November 16 and pledged to prolong the pet's life for one week after each post made by the star.

Miley has not commented on the ultimatum or website.