Sienna Miller looks radiant in fancy thigh high boots at Guccis

Sienna Miller looks radiant in fancy thigh-high boots at Gucci’s private dinner during PFW

Celebrities have descended on Paris ahead of the city’s Haute Couture Fashion Week.

And Sienna Miller looked radiant as she headed to Gucci’s private dinner on Tuesday to celebrate the fashion house’s high jewelry collection.

The actress, 40, slipped into a chiffon blouse with edgy leather boots that laced up to her thighs as she posed for photos at the Hotel Ritz.

Radiant: Sienna Miller, 40, looked radiant as she headed to Gucci's private dinner on Tuesday to celebrate the fashion house's high jewelry collection

Radiant: Sienna Miller, 40, looked radiant as she headed to Gucci’s private dinner on Tuesday to celebrate the fashion house’s high jewelry collection

Her elegant bodice wrapped around her small waist and was tied at the side with a large bow.

Sienna complemented her look with a sparkling crystal necklace and carried a black leather Gucci handbag.

She was joined at the event by boyfriend Oli Green, who is 15 years her junior, and the pair looked on affectionately for a photo.

Pretty: The actress slipped into a chiffon blouse with edgy leather boots that laced up to her thighs as she posed for photos at the Hotel Ritz

Pretty: The actress slipped into a chiffon blouse with edgy leather boots that laced up to her thighs as she posed for photos at the Hotel Ritz

Couple: She was joined at the event by her boyfriend Oli Green, who is 15 years her junior

Couple: She was joined at the event by her boyfriend Oli Green, who is 15 years her junior

Sienna and Oli have been dating since February and have had a ton of cute appearances together ever since they went public with their relationship.

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 that she thought she would be married and have children by her 30s, but the relationships she was in during those years didn’t work out.

Refined: Her elegant top wraps around her narrow waist and is tied at the side with a large bow

Refined: Her elegant top wraps around her narrow waist and is tied at the side with a large bow

Vogues Edward Enninful ties the knot

Cute: Sienna and Oli have been together since February and have since made a ton of cute appearances together as they made their relationship public

Cute: Sienna and Oli have been together since February and have since made a ton of cute appearances together as they made their relationship public

High fashion: Sienna complemented her look with a sparkling crystal necklace and carried a black leather Gucci handbag

High fashion: Sienna complemented her look with a sparkling crystal necklace and carried a black leather Gucci handbag

Pal: Sienna later joined Diane Kruger for a photo

Pal: 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

Chic: Actress Diane looked chic in a metallic silver top and semi-sheer black skirt and blazer

Speaking to British Vogue, Sienna said: “I had invested what felt like important years in what was just a bucket with a hole by one person. I wasted time And I felt like time really is my currency.”

She was quick to point out that she wasn’t referring to Tom Sturridge, who she dated from 2011 to 2015 and with whom she shares ten-year-old daughter Marlowe.

But the couple recently proved they were friends when they partied with their respective partners – Oli and Alexa Chung – at this year’s Glastonbury Festival this summer.

Racy: Sienna looked every inch the blonde bombshell in her racy thigh-high boots

Racy: Sienna looked every inch the blonde bombshell in her racy thigh-high boots

Luminous: Also at the event was Rosie Huntington-Whitely, who looked incredible in a semi-sheer black dress with a beaded neckline Stylish: She paired her look with a pair of leather lace-up boots

Luminous: Also at the event was Rosie Huntington-Whitely, who looked incredible in a semi-sheer black dress with a beaded neckline

Fashion house: Gucci CEO Marco Bizzarri looked chic in a navy blue three-piece suit as he smiled with Rosie

Fashion house: Gucci CEO Marco Bizzarri looked chic in a navy blue three-piece suit as he smiled with Rosie

Classy: Diane was joined at dinner by her husband Norman Reedus

Classy: Diane was joined at dinner by her husband Norman Reedus

High fashion: Tina Kunakey, 25, stunned in a bold textured leather dress

High fashion: Tina Kunakey, 25, stunned in a bold textured leather dress

Cute: Rosie posed for a photo with Tina as they rubbed shoulders at the event

Cute: Rosie posed for a photo with Tina as they rubbed shoulders at the event

Back pat: Also present was Marco Bizzarri, 60, the CEO of Gucci

Back pat: Also present 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 apologized to her in July of the following year for an affair with his children’s nanny.

Sienna also had a highly publicized affair with actor Bathlazar Getty in 2008.

Reflecting on how difficult her 30s were, she added, “There was a lot of anxiety. Relationships hadn’t worked out – I envisioned being married, having three kids and being an amazing mom. I love being a mom. I can do that best.”

Guests: Carla Bruni (right) looked as elegant as ever in a cream coat with a fur collar

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 elegant curls

Elegant: The singer styled her brunette hair into elegant curls

Pose: Rosie joined Swarovski's Global Creative Director Giovanna Battaglia for a photo

Pose: Rosie joined Swarovski’s Global Creative Director Giovanna Battaglia for a photo

Contestants: Chriselle Lim, Susanna Lau and Anny Fan (LR) opted for cream ensembles with red accents

Contestants: Chriselle Lim, Susanna Lau and Anny Fan (LR) opted for cream ensembles with red accents