The Duchess of York rubbed shoulders with Hollywood stars on the red carpet at the Venice International Film Festival.
Sarah was pictured alongside stars such as Laura Dern and Hugh Jackman at the festival, ahead of the premiere of The Son on Wednesday.
Dern and Jackman star in the film with Vanessa Kirby and Zen McGrath, directed by Florian Zeller.
The Son is based on the 2018 play The Son of Zeller and acts as a prequel to the 2020 film The Father, which starred Olivia Colman and Sir Anthony Hopkins, who won the Best Actor Oscar for his performance.
Sarah appeared in good spirits and put on a long dark green dress, which was tied at the side with a jewel clasp.
She married Prince Andrew, Duke of York in 1986, although they separated in 1992.
Dern joined the celeb roster to turn heads with her eye-catching outfits: a sparkling navy ball gown with ornate gemstones over a beaded mesh layer.
She paired the dress with a sequined blazer that featured pink stripes and diamond-shaped cutouts on the back.
Earlier today she was pictured in a vibrant knit dress, featuring a floral pattern in a bright yellow hue highlighted with black and orange.
Her co-star Kirby also shone on the carpet, in a floor-length dress, covered in mirror shards, with a fur lining.
Jackman opted for a simple black tuxedo for the event.
Elsewhere, other famous faces arrived for the annual dinner of amfAR, the foundation for AIDS research, including British singer Ellie Goulding and actresses Heather Graham and Zooey Deschanel.
Goulding opted for a dark, shiny dress with black floral patterns and a split leg, while Deschanel wore a pale blue one-shoulder dress decorated with floral appliques.