The Windsor family has finally announced the Duchess of Cambridge's due date: Prince George's little brother or sister will be born in April 2015, which will make the royal baby almost two years younger than its brother.

The Duchess of Cambridge's due date announcement comes over a month after the announcement that she was expecting a child, which came earlier than usual after the Duchess, known before as Kate Middleton, was suffering from another bout of hyperemesis gravidarum, which is extreme morning sickness, a condition she also suffered during her first pregnancy.

When the pregnancy was first announced in early September, the Duchess of Cambridge's due date had been kept quiet, and it had only been said that she was again suffering from hyperemesis gravidarum, which meant she had to cancel different engagements at the time due to her delicate condition, according to the United Kingdom's Daily Mail.

The announcement of the Duchess of Cambridge's due date comes paired with a second one: the Duchess' health is improving. It seems the wife of second in line to the British throne is improving, Prince William Duke of Cambridge, is feeling better from her bout of extreme morning sickness hyperemesis gravidarum.

According to the BBC, the Duchess will be making her first public appearance since the announcement of her pregnancy next Tuesday, when she will join husband Prince William to welcome Tony Tan, the President of Singapore, who will be making a four-day visit to the United Kingdom.

The announcement of the Duchess of Cambridge's due date is a happy one for the Windsor family, who will now be welcoming a new small prince or princess who will become the fourth in line to the throne of the United Kingdom.

The current order is: Prince Charles of Wales; Prince Williams, Duke of Cambridge; one year-old toddler Prince George of Cambridge and then Prince Harry. The birth of the new royal baby would put Harry in the fifth spot, while the baby takes the fourth.

The current monarch, Queen Elizabeth II, is the second-longest reigning monarch in the country, after 19th century Queen Victoria, her great-great grandmother. Queen Elizabeth II has been in the throne for 62 years, while Queen Victoria reigned for 63.

If she continues to reign, Queen Elizabeth would break the record imposed by her ancestor on September 9, 2015.