They're in the public eye basically everyday, yet there's still so much we don't know about.

It turns out that Princes William and Harry have a step sister that we practically know nothing about, reports her.ie.

Their sister is called Laura Lopes and she is Camilla Parker Bowles' daughter.

Since marrying Prince Charles in 2005, Camilla decided to keep Laura out of the public eye, and so far has retained much of her privacy.

Laura also has a brother called Tom, who is a food author and journalist, and they are the children of Camilla and Andrew Parker Bowles.

We're actually quite surprised to find out that Laura was a bridesmaid for Kate during her 2011 wedding to Prince William, since every eye in the world was looking on as the Duke and Duchess said their nuptials.

Laura is currently married to an accountant named Harry Lopes, and they have three children together, Eliza, 10-years-old, and twin boys Louis and Gus who are nine-years-old.

Prince Charles and Princess Diana exchanged vows and then tied the knot in 1981. However, they were not the right people for each other. When they got married, his heart was already with someone else.

According to MARCA, Prince Harry and Prince William have a half-sister by the name of Laura Lopes originally Laura Parker Bowels. Their story begins when they were children, however, their relationship has been a rocky one.

The highly controversial royal love triangle that King Charles, Princess Diana, and now Queen Camila were in had a negative impact on their children's relationship as they did not get along for obvious reasons.

Charles, Diana, and Camilla

If you are new to the world, the story of the marriage of Diana and Charles is one of the most known in the globe. They married in 1981, had children, and divorced in 1996, after there was an infidelity scandal, Charles' love belonged to Camilla, with whom he always kept in touch.

While this was happening Lady Di spoke to the BBC in an unprecedented interview where she opened up the family's dirty laundry and fiercely said "There were three of us in this marriage, so it was a bit busy."

Diana Spencer died in a car accident on August 31, 1997, with Dodi Al-Fayed and the driver of the car, Henri Paul. The news of Lady Di's death shook the royal family and the world in general, as she was the most liked person in the marriage.