The headline "Toddlers at risk from extremists" appeared at the top of The Telegraph's front page on an early edition of the newspaper, above a large picture of William and Kate with their young son, Prince George.
The Daily Telegraph's first headline this morning
The headline related to a story about education secretary Nicky Morgan's speech about the risk of extremism in nurseries.
The picture of the royal couple and Prince George was, in fact, part of a separate story about the Duke of Cambridge taking up a job as a pilot for East Anglian Air Ambulance, with its own smaller headline.
But the juxtaposition with the main headline caused amused readers pointed out the unfortunate layout on Twitter.
The Telegraph scrambled to update the headline in a later edition of the newspaper, changing the word "toddlers" to "nurseries" to remove the implication that William, Kate and George were involved in a toddler extremism plot.
It's not unusual for newspapers to update their front page between editions as news develops after deadline.
But in The Telegraph's case this morning, the position of both the extremism story and the Prince William and Kate story stayed the same - except for the tiny headline change - showing that the edit was a quick correction to the awkward cock-up.