Princess Beatrice has rubbed shoulders with a lot of celebrities over the years, from Kate Moss to Naomi Campbell and Ed Sheeran.
But someone she really bonded with was former Take That star Robbie Williams.
In fact, Robbie reportedly sees Prince Andrew's daughter as a "little sister" after they struck up a special bond when she visited his Beverly Hills home.
Beatrice's mum Sarah Ferguson brought the 33-year-old along for a trip to the £10million pad he shares with wife Ayda Field, and reports suggested they got along like a house on fire.
"Robbie gets on really well with Beatrice. He treats her like a little sister and looks after her. It’s really sweet," an insider told The Sun.
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"A few of Robbie’s football pals were round the other week and Fergie was just wandering about in her robe.
"She came and said hello and was really charming."
Robbie has even given Beatrice an adorable nickname - 'sis'.
The source added that Robbie called Fergie an "amazing woman" and they "got along like a house on fire".
"Robbie likes having Fergie around and said she could stay as long as she liked," they said.
The families are thought to have first met when they holidayed in the Caribbean in 2011 on a yacht owned by British mobile phone tycoon John Caudwell.
Robbie, 47, also has a biological sister named Sally, while Beatrice has Princess Eugenie, 31.
In 2018, Robbie and his wife Ayda Field attended Eugenie's wedding to Jack Brooksbank.
The royal sisters' other celebrity pals include Ed Sheeran - whose face Beatrice once accidentally sliced open with a sword as she pretended to 'knight' singer James Blunt.
Ed was rushed to hospital after Bea swung the ceremonial blade over her shoulder without realising he was behind her.
He was patched up by nurses and the following evening he showed off the scar after the Windsor knees up.
One source said: "He could have been blinded. Beatrice was deeply upset and inconsolable."
The accident happened at the Royal Lodge in Windsor, home to the Duke of York, in 2016.
Prince Andrew was away on business in Mexico, but Sarah, who has staged mock knighthood ceremonies in the past, was at the private dinner party.
The following night, Ed made no attempt to hide his injury as he attended a gig at the Shepherd's Bush Empire posing for pictures with fans.
Beatrice is also good friends with Ellie Goulding, in fact - Eugenie is said to have introduced the pop star to her now-husband Caspar Jopling.
She also counts celebrity couple Ashton Kutcher and Mila Kunis, and supermodel Karlie Kloss among some of her close pals.
As well as their good friends, the princesses will likely be leaning on each other at the moment as they're going through a difficult time.
Beatrice and Eugenie will likely be 'devastated' by the scandal surrounding Prince Andrew and a planned increase in their royal duties after Megxit is now likely to be shelved, says to an expert.
Richard Fitzwilliams indicated that the pair would be deeply affected by the ongoing case affecting their father adding that they are a close-knit family.
The sisters were due to take on more royal appearances after Meghan Markle and Prince Harry decided to quit their royal duties in 2020.
But any expansion of their roles will now have to be placed on hold after the Duke of York was stripped of his military titles and royal patronages, according to the former editor of the 'The International Who's Who' book series.
Mr Fitzwilliams told Express.co.uk: "The Yorks are a close-knit family and this will be devastating for them.
"They only perform a very few royal duties.
"However, any expansion of their roles, which was a possibility as there are fewer senior royals and many of them are no longer young, is now impossible for the foreseeable future."
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