Lord Sugar just got tricked into saying 'happy birthday' to a serial killer

Lord Alan Sugar is not the first person to be tricked into posting a picture of Harold Shipman, and we hope he won't be the last.

The old 'get a famous person to retweet a picture of a serial killer' joke has taken many forms over the years.

This particular case, though, is an instant classic in the genre.

Twitter user LunchBoxHead tweeted at The Apprentice star to ask him to send a birthday shout out to his 'dad', with a picture of Harold Shipman, Britain's worst offending serial killer, who murdered over 200 people.

Sugar didn't miss a beat, obligingly posting a happy birthday message - complete with a joke about not being able to tell whether son or father were older.

What a time to be alive.

More: Donald Trump just accidentally revealed he has no idea who Jeremy Corbyn is

More: It looks like Lord Sugar had a cracking night out