Prince Harry's new girlfriend Camilla Thurlow is reportedly disappointed that pregnant Kate Middleton's morning sickness caused Prince Harry's 30th birthday party to be postponed, also delaying Prince Harry and Camilla Thurlow's relationship debut.

Kate Middleton was planning a birthday party for Prince Harry, who turned 30 on Monday. Following news that Kate Middleton is pregnant with her second child, an announcement was made that, similar to her first pregnancy with Prince George, the Duchess of Cambridge is suffering from acute morning sickness, otherwise known as Hyperemisis Gravidarum, leaving her dehydrated and unfit for public events.

Prince Harry's birthday party was to serve two purposes: to have a fun, mini-banquet at Kate Middleton and older brother Prince William's newly refurbished apartment in Kensington Palace, and to debut his relationship with new girlfriend and former Miss Edinburgh, Camilla Thurlow.

However, the Mirror reports that Prince Harry contacted his guests and announced he felt it was "inappropriate" to carry on with the party without his sister-in-law's presence.

A source said: "Harry was in no doubt that the party should be postponed, even though 30 is an important milestone."

Though Harry's girlfriend Camilla Thurlow is reportedly disappointed that her official debut as the Prince's partner will be postponed, she may not have to wait long.

"He has promised his friends he will organize a post-30th birthday party when the time is right," a source told the Mirror.

As we previously reported, according to E! News the former Miss Edinburgh is having a very different effect on Prince Harry than his previous girlfriends, like Cressida Bonas and Chelsy Davy.

"They've been talking until late into the night and having one of those magical times that you have when you first fall in love and want to find out everything you can about the other person," a source told E! News. "Harry's had no interest whatsoever in going out and just wants to focus on Camilla without any distractions."

Harry and Camilla first started dating about six weeks ago.

"Camilla's the full package - she's got beauty and brains," the royal insider told E! News. "But Harry loves how she's devoted her life to charity - she's fully committed to helping other people and he sees a lot of his mother Diana's goodness in her."

Harry "sees Camilla as much more than a fling," the source added.

"This was supposed to be Harry's last summer of fun before he turned 30 and got serious and settled down," they said. "The second he decided he'd spend July and August partying and being young, carefree and single while he still could be he was introduced to Camilla by his cousin Princess Beatrice and his crazy party plans went out of the window and all of a sudden he's acting like a contented married man. It's a great sign - it shows how mature he is now and that he realizes when he finds happiness to not let go of it and to nurture it."

E! News reports that his girlfriend Camilla Thurlow has told friends that she finds Prince Harry "sweet, sensitive and so romantic."