Grace Kelly's granddaughter was left out of the line succession in Monaco after a paternity row, reports claim.
The Oscar-winning actress joined the royal family when she married Rainier III, Prince of Monaco, who went on to have one of the longest reigns in European history.
But in 1982 she suddenly died in a car crash with her youngest daughter, Princess Stephanie, in the vehicle.
The tragedy played into the 'Curse of the Grimaldis' - a national myth that Rainier's family were cast under an evil spell by a witch in the 13th century.
"Never will a Grimaldi find happiness in marriage," she is supposed to have uttered, according to the story which will be explored in a Channel 5 documentary this weekend, ‘The Curse of Grace Kelly’s Children’.
Although the legend isn't taken as seriously anymore, the family did go on to suffer countless marital woes, sudden divorces and tragic deaths.
Princess Stephanie, currently 14th in line to the throne, grew up to start a secret relationship with her bodyguard Daniel Ducruet.
She gave birth to their two children, Louis and Pauline, in 1992 and 1994. When the couple eventually married in 1995 their son and daughter were added to the line of succession.
But they divorced a year later and Stephanie welcomed a third child, Camille Gottlieb, in 1998.
The name of Camille's father was not included on her birth certificate, sparking speculation that the birth had come from a secret affair.
Camille put an end to the rumours herself when she shared a heartwarming photo confirming who her dad was on Instagram.
The picture shows her as a baby being held by a man - Jean Raymond Gottlieb, a former palace bodyguard.
It wasn't the first time an illegitimate child occurred in the Monegasque royal family - there has been at least one in every generation for the last century.
Many obtained succession rights later in life through adoption or legitimisation.
But it was Camille's own grandfather - Rainier himself - who introduced new laws that made obtaining rights in this way impossible.
The 2002 constitutional change restricts succession to simply a direct and legitimate issue.
The various headline-grabbing paternity secrets to beset the family have been the source of ill will in the past.
But despite not being in line to the throne, Camille has always spoken warmly of both her parents.
Camille explained: “My father is my right lung, my mother is my left lung.
“Without them, I could not live.
“They did not stay together very long, but they always said to me, ‘We have desired you and our happiness is that you are here’.
“I am very lucky. I would not trade my family for another — for nothing in the world.”
She also revealed that she is close to her half-siblings.
Camille claimed: “Between us, we call ourselves the ‘Three Musketeers’.”
Speaking to French news outlet Point de Vue, she continued: “With Pauline, we do not need to phone or send messages to know that everything is fine.
“Louis is very protective of us three, he is the most serious, the wisest. My sister is more rock, more rebellious perhaps.”
Stephanie is also unlikely to ever inherit the throne, as the youngest sibling to current monarch Prince Albert II and Princess Caroline.
Albert has an illegitimate child born in 2003.
He also has two legitimate twins — Hereditary Prince Jacques and Princess Gabriella, Countess of Carlades — who were born in 2014 to Albert’s wife Princess Charlene.