The Royal Family is looking forward to welcoming another prince or princess into the world.

Their rep confirmed to Fox News that Princess Kate and Prince William are expecting their first child.

"Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting a baby," the rep said in a statement. "The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall and Prince Harry and members of both families are delighted with the news."

The rep also confirmed a bit of scary news, saying Princess Kate had been admitted to the hospital.

"The Duchess was admitted this afternoon to King Edward VII Hospital in Central London with Hyperemesis Gravidarum," the rep said. "As the pregnancy is in its very early stages, Her Royal Highness is expected to stay in hospital for several days and will require a period of rest thereafter."

Hyperemesis Gravidarum is very acute morning sickness, which requires supplementary hydration and nutrients.

The rep would not say how far along she is, only that she has not yet reached the 12-week mark.

The confirmation of her pregnancy was greeted with congratulations.

Prime Minister David Cameron wrote on Twitter that he was "delighted by the news," saying the royals "will make wonderful parents."

沪江娱乐快讯：自从上周起凯特王妃就频频被传出已经怀孕的消息，不过直到昨日（当地时间12月3日），这个喜讯才终于得以证实。先是媒体争先报道，之后英国王室也证实了这一消息。

不过就在喜讯传出后不久，凯特就被送进了伦敦King Edward VII医院，原因是她妊娠反应较为严重，早晨起就开始剧烈呕吐。威廉王子紧随爱妻去医院陪护，不过没过太久就离开，看来凯特已无大碍。随后皇室对外又发表了一项声明：“因为王妃还处在怀孕初期，需要密切观察，在接下来的几天里王妃将住在医院进行休养。”

威廉王子与凯特于2011年4月结婚，浪漫而盛大的场面至今让许多人难忘，二人结婚之后感情也一直温馨融洽，他们将迎来第一个宝宝的消息刚一传出就得到了来自世界各地的祝福。

英国首相戴维·卡梅伦在推特上说：“我非常高兴地知道公爵与夫人将迎来他们的孩子，他们将会是非常棒的家长。”英国女歌手谢丽尔·科尔（Cheryl Cole）也兴奋的说：“我们将有一个皇室宝宝了，真是太兴奋了！关系威廉和凯特！”