Is the royal baby finally on its way?
But Telegraph associate editor Camilla Tominey shot down the rumors, saying the ambulance is just a "driver training vehicle picking up food for students while out and about all day, according to South Central Ambulance Service."
"Keep calm tweeps. It could be another few days yet," Tominey added.
ITV's royal editor Chris Ship told "Good Morning Britain" the birth is "imminent."
"We know the baby is due, in fact I can tell you that the due date is pretty much today," Ship said. "Today, tomorrow, we really are in the realms of imminent arrival.
"Has it happened overnight? Well, put it this way, we haven't been told that it's happened overnight, but it's definitely any day now."