Sarah Ferguson, 64, steps out with glamorous Australian singer and Neighbours actress Delta Goodrem, 39, in London
There's plenty of unlikely friendships in the world of showbusiness and royals - from King Charles and Sir Rod Stewart to Kris Jenner's boyfriend Corey Gamble and Prince Harry.
Now, another unexpected friendly relationship has emerged after Sarah Ferguson, 64, fondly known as Fergie, was spotted alongside Australian singer Delta Goodrem, 39, in London.
The two famous faces exchanged hugs and looked happy to see one another as they stepped out in the British capital, where they were also joined by Delta's guitarist fiancé Matthew Copley and friends.
Dressed to impress in a smart maroon jacket and matching wide-leg trousers, the Australian singer is currently in the UK as she gears up for her performance at the Mighty Hoopla Festival in London on June 2.
Before her successful singing career, Delta featured in Australian soap opera Neighbours as the character Nina Tucker.
Sarah Ferguson , 64, fondly known as Fergie, was spotted alongside Australian singer Delta Goodrem , 39, in London .
The Duchess of York, ex-wife of Prince Andrew, looked equally stylish as her A-lister friend in a chic black blazer paired with a knee-length skirt. It's unclear how the unlikely pair know each other.
Fergie - mother to Princesses Beatrice and Eugenie - completed her look with a pair of dainty gold hooped earrings and a smattering of glamorous makeup.
The outing comes after Sarah was filmed silencing an audience at Cannes Film Festival as she thanked an artist for a portrait of the late Queen and lectured the crowd on the environment.
Fergie lost her cool as the crowd continued to speak over her while she stood on stage at the 77th Cannes Film Festival gala auction last week and ordered them to be 'quiet' as she thanked Simon de Pury, who had auctioned off a portrait of the late monarch by Chris Levine for €475,000 in aid of charity.
The ex-wife of Prince Andrew, who donned a custom-made £13,202 Lilith Cocktail Dress, slammed the chatty audience for looking for 'the next party' rather than listening to her - before going on to apologise to young people about the state of the planet.
The clip, in which a frustrated Fergie orders the audience to 'stop, stop, stop' was posted on Instagram by German-American model Heidi Klum, who attended the event in aid of amFAR, a non-profit which promotes AIDS treatment and HIV prevention around the world.
Sarah can be heard saying: 'Quiet! because the incredible person Simon de Pury has done an amazing job tonight, this is exceptional, and all I want to say to everyone in this room is stop, stop, stop.
She continued: 'Did you see I removed the microphone, because all of you are saying "I want to go, because where is the next party? What are we meant to be doing next?"
The two famous faces exchanged hugs and looked happy to see one another as they stepped out in the British capital, where they were also joined by Delta's guitarist fiancé Matthew Copley and friends
The Duchess of York, ex-wife of Prince Andrew, looked equally stylish as her A-lister friend in a chic black blazer paired with a knee-length skirt . It's unclear how the unlikely pair know each other
Dressed to impress in a smart maroon jacket and matching wide-leg trousers, the Australian singer is currently in the UK as she gears up for her performance at the Mighty Hoopla Festival in London on June 2
Before her successful singing career, Delta featured in Australian soap opera Neighbours as the character Nina Tucker
'But what I want to say is why are we here? What is the future and why are we not making our planet better for the youth of tomorrow?
She added: 'I am so sorry that we have completely destroyed your planet, but thanks to amFAR and these people with scientific brilliance...' before the clip ended.
amfAR, The Foundation for AIDS Research, is a non-profit which works to improve treatment of AIDS and HIV prevention around the world.
Sarah was enjoying visiting the South of France after being diagnosed with two types of cancer in the span of eight months.
During the star-studded evening at Cannes, Fergie revealed she has 'put cancer in a corner' as she continues to recover after her diagnosis earlier this year.
Fergie - mother to Princesses Beatrice and Eugenie - completed her look with a pair of dainty gold hooped earrings and a smattering of glamorous makeup
The outing comes after Sarah was filmed silencing an audience at Cannes Film Festival as she thanked an artist for a portrait of the late Queen and lectured the crowd on the environment
Fergie, who is now 'all-clear' from the illness, according to her daughter Beatrice, told People magazine: 'This evening I am doing very well. I think that we've managed to get cancer in the right place rather than cancer ruling me.'
She continued: 'I think you always have to be aware. I think it's great to get checked for breast cancer [and] melanoma. I think you just have to be very candid about it. I think a lot of people get very frightened to talk about these things. I'm very happy with my mastectomy and my breasts and just to talk about it.'
Sarah joined the likes of Bella Thorne and Kelly Rowland, Heidi Klum and her daughter Leni at the star-studded gathering.
