Fans were sent into a state of confusion when a series of tweets issued by Jack Black's band, Tenacious D, announced that the star had died.
The official Twitter account for the comedy band - made up of Black and musical partner Kyle Gass - tweeted that they are "sad to officially annouce (sic) the death of Jack Black at the age of 46, rest in peace brother."
A second tweet an hour later sent out the hashtag #RIPJackBlack, while a third read, "It is with a heavy heart I am to announce that Jack Black passed away last night at 3.37am. The cause of death is yet unknown."
The announcement shocked fans - but many wondered if it could be a Twitter hack, given the lack of detail, spelling and grammar errors and absence of other credible reports.
And it appears they are right. The hacking was later confirmed by Tenacious D themselves, who said it was nothing but a "sick prank".