Ashley Roberts, 41, and Mischa Barton, 37, stun in blue form-fitting mini dress and chic blazer

Ashley Roberts and Mischa Barton stunned in a form-fitting, blue-figured mini dress and chic plaid brown blazer as they attended a beauty launch for Barkha beauty on Monday night.

The former Pussycat Doll stole the show in a fitted baby blue dress with long sleeves and ruffles down the left side.

The blonde bombshell wore her hair in straight locks with a nude gloss that accentuated her full lips.

The 41-year-old completed the outfit with a white handbag and tiny white heels that revealed the writing of her foot tattoo.

The duo were out in the heart of Mayfair for dinner at Greek and Mediterranean restaurant Bacchanalia to celebrate the launch of entrepreneur Barkha Shewak’s lip beauty brand.

Bangers: Ashley Roberts, 41, (pictured) and Mischa Barton, 37, look incredible in a blue-figure mini dress and chic blazer as they attend Monday night’s beauty launch

Looking good: Mischa paired her blazer with a white shirt, plain black tailored trousers and shiny black ankle boots

Glued to her phone: The actress’ personalized phone case was seen clutching the device in her hand

Ashley is known as friends of the beauty guru after herself, Barkha, Rita Ora and Karen Wazen went out for dinner together in Dubai in April.

Actress Mischa opted for a less colorful look and paired her blazer with a white shirt, plain black tailored trousers and shiny black ankle boots.

The OC star completed her outfit with a white summer scarf and bronze Angelo Marani bag.

Formerly a brunette, the now blonde wore her hair loose around her face, clutching her phone tightly in her hand and revealing her personalized case with name.

The 37-year-old was spotted after it was suggested that the star would be tipped to appear on the new season of The Masked Singer Australia as one of the new contestants.

Mischa recently spent time in Australia after it was confirmed that she will be joining the cast of Neighbors in the television series reboot that will air on Amazon Freevee.

She will play the unpredictable Reece and her dedication to the new role saw her change her hair as she dyed her hair from brown to blonde to embrace her new persona.

Blue is clearly Ashley’s color right now, as she got her heart pumping this weekend in a light blue bikini instead of heading to Glastonbury.

The singer instead enjoyed a dip in a pool on the roof of Battersea Power Station.

Too hot to handle: Ashley got her heart racing this weekend in a light blue bikini instead of going to Glastonbury

Champagne lifestyle: Gene Gallaghet (left) enjoying a drink with the boys

Cheers: Ashley Roberts enjoyed a drink at the event

Fun: People looked like they were having a good time at the party