New software? New hardware? The famous old "one more thing"? No one knows for sure what Apple will unveil during a developers' event Monday afternoon, but there are plenty of good guesses.
Follow our live blog below for minute-by-minute coverage of the WWDC 2014 keynote.
This story has been updated to reflect Apple's statement that a Twitter account attributed to an executive is not authentic. Apple previously indicated the account in question was authentic.