Sarah Ferguson unleashed a seething rant at the Cannes Film Festival party after the audience spoke over as she took to the stage.

Fergie, 64, looked as glamorous as ever as she attended the amFAR gala charity gala, which works to improve the treatment of AIDS and HIV prevention. Donning a £13,000 Lilith Cocktail Dress, the Duchess of York took to the stage during the event as a painting of the late Queen was auctioned off for the cause.

However, she snapped at the audience as they failed to listen to what she had to say, ordering them to be quiet before apologising to young people about the state of the environment. It came as she thanked the artist Simon de Pury for creating a painting of the late monarch, which was auctioned off for over £400k.

Fergie told the audience to be quiet while thanking artist Simon de Pury, pictured, for this portrait of the late Queen ( 
Image:
Getty Images for amfAR)In a clip posted to Instagram by the supermodel Heidi Klum, Prince Andrew’s ex-wife ranted: “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.

“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?’ 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 then says “I am so sorry that we have completely destroyed your planet, but thanks to amFAR and these people with scientific brilliance..” before the clip cuts out. It comes after earlier on the event’s red carpet, Fergie shared a candid insight into royal family life, as she made a veiled reference to the ongoing friction taking place within the royal ranks.

Fergie wore a £31k dress to the bash ( 

Image:
Getty Images for amfAR)
Speaking to PEOPLE magazine, she opened up about family togetherness, telling the publication: “I think family unity is key… I think the key to life is that we all support each other.” The Duchess then added: “And also forgiveness is a great thing. I think forgiveness of yourself, and forgiveness of others.”

Earlier this month, Fergie’s oldest daughter Princess Beatrice revealed in a rare update that her mother was now “all clear” after her cancer struggle. Sarah also told the publication: “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. I’ve put cancer in the corner.

“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.”

It is almost a year since Fergie’s breast cancer was found at an early stage during a routine mammogram. She underwent surgery at London’s King Edward VII’s Hospital, which has treated the royal family for decades. Then in the New Year, it was revealed that Fergie had been diagnosed with skin cancer with the disease discovered after several moles were removed when she was treated for breast cancer.

In recent months, Fergie has increasingly been welcomed back into the royal fold attending several family events alongside her ex-husband Prince Andrew. At Christmas, she joined the royals at Sandringham for their annual walk to church on Christmas morning and attended a memorial service for the former King Constantine of Greece at Windsor Castle in February.

In March she was also among a select few members of the royal family that joined King Charles for the annual Easter Sunday service at St George’s Chapel in Windsor.