Commenting on the embarrassing error, one relieved fan responded: "OH thank God!!!you're alive!!....or i was about to DIE."
Clearly seeing the funny side, another added: "No one told you, how rude! You could have stayed home and enjoyed the days playing dead. Now you have to get back to living. SMH Stay healthy Superman."
Elsewhere another fan referred to his role as the iconic superhero, who can only be killed by alien mineral Kryptonite, writing: "RIP bro, don't worry you'll come back Superman always comes back (sic)."
Another drew parallels with a recent death hoax involving another Hollywood star, adding: "Lmao Recently, it was done to Sylvester Stallone. Said he died from a long fight of prostate cancer. Sikeee!"
While another commented: "This is nonsense. Aka Fake News. Wishing you an excellent health and many years of happy life."
Cavill's assumed death comes amid claims he is on the lookout for a new woman after splitting with girlfriend Lucy Cork, after friends were reportedly heard declaring that he is "single".