As the Royal Baby Watch enters its final hours with Kate Middleton in labor, onlookers across the world are wondering how they will know when the child is born.
Assuming all goes according to plan with the delivery, Queen Elizabeth II will be the first person to receive word that the royal heir has been born.
Unless she's asleep, in which case no one will find out until she awakes.
Pround papa Prince William will call his 87-year-old grandmother on an encrypted phone to let her know that Kate Middleton has given birth, reports say.
But if the birth is in the middle of the night, he will not wake her up.
Kate has been in labor since early Monday at St. Mary's Hospital in London. Experts estimate that first-time mothers are generally in labor 12-24 hours.