Isla Fisher Stuns in Strapless Blue Dress at Serpentine Summer Party

Isla Fisher ensured all eyes were on her when she stepped out in a vibrant aqua frock at the Serpentine Gallery Summer Party in London. 

The 49-year-old Aussie actress brought a touch of old Hollywood glamour to her whimsical garden party attire, posing for photos in the eye-catching gown by bridal label Monique Lhuillier with a broad smile. 

Each year, London’s Serpentine Gallery throws an invitation-only fundraising soirée to bring together the worlds of art, fashion, and international A-listers on the Serpentine Pavilion lawns. 

‘Somewhere between mermaid and mid-life crisis,’ Isla captioned her Instagram post from the night, in a playful nod to her recent high-profile split with Sacha Baron Cohen.

She was in fine company, mingling with a litany of global stars, including Oscar-winner and co-host of the event Cate Blanchett, Rebel Wilson, Lily Allen, and Kelly Osbourne. 

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Isla Fisher ensured all eyes were on her when she stepped out in a vibrant aqua frock at the Serpentine Gallery Summer Party in London. Pictured 

The 49-year-old Aussie actress brought a touch of old Hollywood glamour to her whimsical garden party attire, posing for photos in the eye-catching gown by bridal label Monique Lhuillier with a broad smile 

Isla opted for a classic sweetheart neckline and romantic silhouette to offset the eye-catching shade of her gown. 

The dress itself is covered in floral appliqués and striking fine embroidery – and fanned out around the star as she walked. 

The Confessions of a Shopaholic star kept her accessories and makeup to a minimum, adding a warm pink lipstick as a focal point. 

Isla carried a small silver clutch purse and let her vibrant locks hang loose around her shoulders, adding to the princess-like quality of the ensemble. 

The Australian beauty hardly appeared to be in the midst of a ‘mid life crisis’ as she moved between architectural marvels and open-air installations, before taking in live sets by singer Caroline Polachek and DJ GALLiVANTER.

Many of the guests tried their hand at the mermaid aesthetic, with Cate Blanchett, 56, wearing a distinctive, seashell-encrusted top from Dilara Fındıkoğlu’s Fall 2025 ready-to-wear collection. 

The eccentric garment featured a corset-like, structural bodice that was festooned with shells of all shapes and sizes, and a high, choker neck. 

Cate is the first star to receive the honour of co-hosting Britain’s answer to Anna Wintour’s star-studded Met Gala in 25 years. 

‘Somewhere between mermaid and mid-life crisis,’ Isla captioned her Instagram post from the night, in a playful nod to her recent high-profile split with Sacha Baron Cohen 

Cate Blanchett also attended the event 

Isla and her ex-husband Sacha announced they had finalised their £120million divorce on June 14, two weeks prior to her appearance at the party of the summer. 

In a message, posted simultaneously on both their Instagram sites, the pair said: ‘Our divorce has now been finalised. 

‘We are proud of all we’ve achieved together and, continuing our great respect for each other, we remain friends and committed to co-parenting our wonderful children. We ask for the media to continue to respect our children’s privacy.’

Baron Cohen, 53, and Fisher first met in 2001 and married in 2010. They were believed to have one of the strongest marriages in showbusiness – before quietly separating in 2023.

They then publicly announced their break-up in April 2024, and it now appears they have amicably resolved any differences. 

A source said: ‘It’s all sorted. Now Sacha and Isla both just want to get on with the rest of their lives – and focus on their family’s well-being.’

The couple – who have three children together – first met at a party in Sydney, Australia, in 2001. 

Speaking of their first encounter, Baron Cohen recalled quickly noticing that Fisher was ‘hilarious’.

Sacha Baron Cohen and Isla Fisher (pictured in 2017) have finalised their £120million divorce

He remembered: ‘We were at a very pretentious party, and me and her bonded over taking the mick out of the other people at the party. I knew instantly. I don’t know if she did.’

The pair announced their separation last year with a picture of themselves wearing tennis whites.

They confirmed in an accompanying message: ‘After a long tennis match lasting over 20 years, we are finally putting our racquets down.’

Speaking earlier this year of their break-up, Fisher said: ‘It’s the most difficult thing that I’ve been through and I’ve learnt so much about myself in the process. 

‘I never imagined my family being separated but we are committed and loving parents.’