Kensington Palace reveal when Kate and William's third baby will be born
The due date of the third royal baby has been narrowed down in a statement from Kensington Palace
The Duke and Duchess of Cambridge are "delighted" to be expecting their third child in April, the palace said.
The news comes just a day after Kate had a dance with Paddington Bear at London's Paddington station.
She has reportedly been struggling with hyperemesis gravidarum - a severe form of morning sickness - which she also endured through her two previous pregnancies.
Kate and William have two children, Prince George (4) and Princess Charlotte (2).
The new royal baby should arrive the month before the Cambridges' daughter Princess Charlotte turns three. However, it is believed that Kate went over her due date on both previous pregnancies.
The Duchess gave birth to George and Charlotte at the private Lindo Wing at St Mary's Hospital in Paddington, central London, and will be expected to do the same, unless she opts for a home birth.
The new baby will be born fifth in line to the throne, pushing uncle Prince Harry into sixth place.
It is likely Kate has now had her 12 week scan and seen an ultrasound image of her baby.
Soon after the news of the pregnancy was revealed in September, William revealed there was "not much sleep" being had at the main family home of Kensington Palace as Kate fought her severe morning sickness.
"We need Catherine to get over this first bit and then we can start celebrating," he said at the time.
"It's always a bit anxious to start with, but she's well."
2018 will be a busy one for the couple, in addition to preparing for their third child, they have also announced an official trip to Sweden and Norway. Kensington Palace said the couple had been asked to undertake the Scandinavian visit on behalf of the Foreign Office.
The royal household also announced that William is to make a solo official visit to Finland next month.
William was already committed to visiting Finland in 2017 to mark the centenary of the country's independence. Depending on the exact date of the joint tour, the couple may now be making the trip to Norway and Sweden in the depths of the Scandinavian winter.