Royal princess: What it's like to be the second child

Life as a second-born: hand-me-downs, fewer home videos and constantly being compared to the first-born.

We don't all get palaces, tiaras or carriages, but Prince George's royal sister should rightly have "second child syndrome" more than any of us.

After all, royal babies are branded "the heir and the spare" before they've even learned to talk.

As things stand, the new HRH won't inherit the throne. It will be Prince George after Charles and William.

This royal baby will have a lot more freedom than her older brother. Still, as Prince Harry found out in Las Vegas, life is not always a fairytale.

Dirk Flower, a psychologist, tells Newsbeat: "It can be quite a competitive situation and the second-born is forever trying to compete for attention with the parents from the first born.

"The closer they are in age, the more they tend to compete."

Second-borns are apparently not as mature as first-borns.

"The older child tends to be more intellectually mature because they've had that extra input and they also have that extra sense of responsibility.

"The next child has to work out how to get their stimulation from their environment to get the attention of their parents and they'll also look to get it from the older child."

What is the first-born feeling?

"It can lead to anger, resentment and anxiety depending on the age of the child and the way the child is introduced to the new situation."

He explains children go through this because it's a major change in their lives and it depends how their parents manage it and how well organised they are.

"The elder sibling may revert to earlier behaviour.

"They could start to wet the bed.

"They may start to suck their thumb or want to engage in more immature behaviours so they feel more secure about the situation."

Prince Harry wanted to serve on the front line in Afghanistan but army chiefs refused to send him to Iraq because of "unacceptable risks".

After persisting he eventually spent 10 weeks serving in Afghanistan and was the first royal in more than 25 years to serve in a war zone.

Then he was forced to pull out after news leaked of his unpublicised deployment.

Last year Prince Harry launched the Invictus Games - a sporting event for injured members of the armed forces.

After 10 years in the military Captain Wales, as he is known in the army, has decided to leave the forces in June.

Princess Anne hasn't let being second born hold her back and let her elder brother take all the titles.

In 1971 Princess Anne became the first royal to be named the BBC's Sports Personality of the Year.

The Princess Royal competed for Britain in the 1976 Montreal Olympic Games in the British three day event team.

She was the first member of the British royal family to compete in an Olympic event.

Princess Margaret appeared to have enjoyed her life.

She drank, smoked, partied, had affairs and got divorced and arguably made the royal family seem much more like a normal family.

The queen's sister was the first member of the royal family to have their wedding broadcast on television and she later became the first royal to appear in a soap.

Sadly, she didn't go in the Queen Vic. She went on The Archers instead.

Our most recent king was a special case.

He was the second son of George V and never expected to become king.

If you've seen The King's Speech you'll know all about this.

His older brother Edward VIII gave up the throne in 1936 because he wanted to marry a divorced woman called Wallis Simpson - something the British government wouldn't allow.

During World War II the British people looked up to George VI for his determination to defeat Hitler and commitment to stay in London despite Buckingham Palace being bombed.

Follow @BBCNewsbeat on Twitter, BBCNewsbeat on Instagram and Radio1Newsbeat on YouTube and you can now follow BBC_Newsbeat on Snapchat.