A prank caller posing as the head of Britain's GCHQ intelligence agency was able to get through to prime minister maker of very serious phone calls David Cameron on Sunday, The Guardian reports.

The prankster identified himself as GCHQ director Robert Hannigan. The Guardian reports that government officials say that the conversation was very brief, and no sensitive information was discussed.

Someone also got their hands on Hannigan's personal cell phone number, and called it. What even is going on over there?

"Following two hoax calls to government departments today," a government spokesperson told The Guardian. "A notice has gone out to all departments to be on the alert for such calls."

[Image via Twitter/@David_Cameron]