Sienna Miller looks radiant in edgy thigh-high boots for Gucci's private ... trends now Celebrities have descended on Paris ahead of the city's Haute Couture Fashion Week. And Sienna Miller looked radiant as she stepped out to Gucci's private dinner to celebrate the fashion houses high jewellery collection on Tuesday. The actress, 40, slipped into a chiffon blouse with edgy leather boots that laced all the way up to her thighs as she posed for photos at Hotel Ritz. Glowing: Sienna Miller, 40, looked radiant as she stepped out to Gucci's private dinner to celebrate the fashion houses high jewellery collection on Tuesday Her elegant top wrapped around and nipped in at her tiny waist, tying at the side in big bow. Sienna accessorised her look with a glitzy crystal necklace and carried a black leather Gucci handbag. She was joined at the event by her boyfriend Oli Green, who is 15 years her junior, with the pair looking at each other loving for a photo. Pretty: The actress slipped into a chiffon blouse with edgy leather boots that laced all the way up to her thighs as she posed for photos at Hotel Ritz Couple: She was joined at the event by her boyfriend Oli Green, who is 15 years her junior Also in attendance at the event were the likes of Vogue's Anna Wintour, Gucci CEO Marco Bizzarri, Diane Kruger, Carla Bruni and Rosie Huntington-Whitely. Rosie looked incredible in a semi-sheer black gown with a pearl embellish neckline. Actress Diane looked chic in a metallic silver top and semi-sheer black skirt and blazer. Fashionable evening: Also in attendance at the event were the likes of Vogue's Anna Wintour Sophisticated: Her elegant top wrapped around and nipped in at her tiny waist, tying at the side in big bow Cute: Sienna and Oli have been dating since February, making a slew of sweet appearances together since as they took their relationship public High-fashion: Sienna accessorised her look with a glitzy crystal necklace and carried a black leather Gucci handbag Pals: Sienna later joined Diane Kruger for a photo Chic: Actress Diane looked chic in a metallic silver top and semi-sheer black skirt and blazer Sienna and Oli have been dating since February, making a slew of sweet appearances together since as they took their relationship public. It comes after Sienna recently said she spent years investing in a relationship with someone who was 'a bucket with a hole in it of a person'. The actress revealed she thought she would be married with children by her 30s but the relationships she was in during those years didn't work out. Speaking to British Vogue, Sienna said: 'I'd invested what felt like the important years in something that was just a bucket with a hole in it of a person. I wasted time. And I felt like time was really my currency.' She was quick to point out she was not referring to Tom Sturridge, who she dated from 2011 to 2015 and shares daughter Marlowe, ten, with. But the pair proved that they were on friendly terms recently, as they partied at this year's Glastonbury festival this summer with their respective partners - Oli and Alexa Chung. Racy: Sienna looked every inch the blonde bombshell in her racy thigh-high boots Glowing: Also at the event was Rosie Huntington-Whitely, who looked incredible in a semi-sheer black gown with a pearl embellish neckline Fashion house: Gucci CEO Marco Bizzarri looked smart in a navy three piece suit as he smiled with Rosie Classy: Diane was joined at the dinner by her husband Norman Reedus High fashion: Tina Kunakey, 25, stunned in a bold structured leather dress Sweet: Rosie posed for a photo with Tina as they rubbed shoulders at the event Rubbing shoulders: Also in attendance was Marco Bizzarri, 60, the CEO of Gucci Prior to her relationship with Tom, Sienna was engaged to fellow actor Jude Law in 2004 after he popped the question on Christmas Day. He apologised to her in July of the following year for having an affair with the nanny of his children. Sienna also had a highly publicised affair with the actor Bathlazar Getty in 2008. Reflecting on her thirties being difficult, she added: 'There was a lot of anxiety. Relationships hadn't worked out – I imagined that I would be married with three kids, being a great mum. I love being a mother. It's what I do best.' Guests: Carla Bruni (right) looked as elegant as ever in a cream coat with a fur collar Elegant: The singer styled her brunette hair into classy curls Pose: Rosie joined Global Creative Director of Swarovski Giovanna Battaglia for a photo Attendees: Chriselle Lim, Susanna Lau and Anny Fan (L-R) opted for cream ensembles with pops of red All rights reserved for this news site (dailymail) and under his responsibility