Kate Middleton
Kate Middleton Reuters

Excitement is mounting across the United Kingdom as Kate Middleton's official due date of 13 July has arrived. Tabloid photographers are camped outside the Lindo Wing at the city's St Mary's Hospital, hoping to capture the first photographs of the royal baby, who will be third in line to the throne.

"Babies come when they want to, so we will see!" a spokesperson for the royal couple told Hollywood Life, "When the Duchess is admitted to the hospital and is safe and secure, we will release a press release. So far, that has not happened."

During her two-day official visit to Scotland in April, Kate spoke about her baby's due date and names for the newborn.

"It's around mid-July, but apparently babies have their own agenda," the 31-year-old royal said, "We have a short list for both [boy and girl] but it's very difficult. My friends keep texting me names."

Meanwhile, a representative from St James' Palace confirmed to US Weekly a framed announcement will be placed on a wood and gold easel, positioned outside Buckingham Palace. It will have the baby's sex, weight and time of birth while the baby's name will be disclosed on a later date.

"Although an electronic release will go out, we want there to be a degree of theatre about the birth announcement. This is the birth of the third in line to the throne so it is very important. It is an extremely important occasion," a Palace representative told the magazine.

Surprisingly, Kate Middleton managed to attend a doctor's appointment without falling into the hands of the paparazzi outside the hospital.

"I was at St Mary's with Kate Middleton! I was told it was a checkup," a patient at the Paddington hospital told E! News.

Joe Sene, of Vantage News photo agency said, "There are so many different ways into the Lindo. They can easily ghost her in or out."