Jessie Ware larked around with traders dressed as Ronald McDonald as she brokered deals alongside Laura Whitmore and John Terry at the ICAP Charity Day.
The singer-songwriter and podcast host, 40, looked enthusiastic as she headed to the trading firm's London headquarters on Wednesday for the annual charity event.
ICAP Charity Day raises money for charities across the globe, with the company and its brokers giving 100 per cent of one day's revenue away.
Helping to help close deals with clients, Jessie sported a bright green t-shirt and black jeans as she held two telephones to her ears.
Staff don their best fancy dress for the occasion and Jessie was joined on the phones by two employees dressed as McDonalds mascot Ronald - as well as another trader in full Greek god regalia.
Meanwhile Irish presenter Laura, 39, looked suitably festive in a bright red sweat and appeared office ready as she made animated trades across the floor.
Jessie Ware larked around with traders dressed as Ronald McDonald as she brokered deals alongside Laura Whitmore and John Terry at the ICAP Charity Day
Meanwhile Irish presenter Laura, 39, looked suitably festive in a bright red sweat and appeared office ready
Laura was beaming for ear to ear displaying her bright red lipstick as she got into the spirit of the high pressure environment.
Also making an appearance was the former England captain, 44, who made some calls alongside a few traders channelling their best 70s disco divas.
He was also seen beaming with a group of traders dressed in snowsuits - with one in particular reminiscent of George Michael's classic Last Christmas music video ensemble.
John kept his outfit low-key as he sported a navy sweater, as well as wearing a ribbon to represent the Rays of Sunshine Children's Charity.
ICAP Charity Day has had a significant impact since it began in 1993, raising more than £165million.
The funds raised over the years have been donated to more than 3,000 charitable causes around the world.
The Charity Day has form for being quite the star-studded affair, with Joan Collins, Alex Scott and Billie Piper looking office ready as they took part last year.
Actress Joan, 91, cut a glamorous figure in a silver sparkling blouse which she wore with black trousers.
The singer-songwriter and podcast host, 40, looked enthusiastic as she headed to the trading firm's London headquarters on Wednesday for the annual charity event
Staff don their best fancy dress for the occasion and Jessie was joined on the phones by two employees dressed as McDonalds mascot Ronald - as well as another trader in full Greek god regalia
Laura got into the spirit of the dramatic day as she multi-tasked on phone calls
Laura made animated trades across the floor as she was joined by the Ronald McDonald lookalikes
Laura was beaming for ear to ear displaying her bright red lipstick as she got into the spirit of the high pressure environment
She opted or a pair of sunglasses as she made trades alongside an employee in a 90s-style ensemble
Also making an appearance was the former England captain, 44, who made some calls alongside a few traders channelling their best 70s disco divas
John was also seen beaming with a group of traders dressed in snowsuits - with one in particular reminiscent of George Michael's classic Last Christmas music video ensemble
John kept his outfit low-key as he sported a navy sweater, as well as wearing a ribbon to represent the Rays of Sunshine Children's Charity
New dad Jack Whitehall also helped out on the day
He juggled two phones while answering calls
The former Dynasty star also wore a pair of eye-catching red leather globes along with a silver cross necklace.
TV pundit Alex, 40, got stuck in as she held phones in both hands while helping to close deals with clients and raise money for an array of charities.
The star cut a chic figure as she wore an open-collared white shirt underneath a black tailored blazer with shiny lapels.
Alex was all smiles as she posed alongside actress Billie Piper, 41, who matched the former England footballer in a similar black blazer with sparkly black detailing.
Getting involved with the team, the pair posed with brokers who embraced the festive cheer by dressing up as an elf and Oompa Loompa.
Also in attendance at the charity event was Rod Stewart and his wife Penny Lancaster, who joined joins ICAP's broking team.
Joan Collins, Alex Scott and Billie Piper looked office ready as she joined ICAP's broking teams as they took part in the trading firm's 31st annual charity day at its London headquarters last year
Alex was all smiles as she posed alongside Billie Piper, who matched the former footballer in a similar black blazer with sparkly black detailing
Alex Scott looked office ready as she joined ICAP's broking teams as they took part in the trading firm's 31st annual charity day at its London headquarters on Thursday
Jerry Hall was among the stars to join the charity event
Jerry proved she was was good at managing the phones as she worked two devices
Joely Richardson sported a blue suit as she joined the day
She teamed her blue suit with a pink headband
Martin Freeman was also on hand to help out
He gladly manned the phones among a host of other stars
Ellie Bamber oozed cowgirl chic as she took part
She was joined by a group of denim-shirt wearing men
Rachel Riley was pictured high-fiving someone in the office
The married couple coordinated their looks in matching red ensembles, as Penny, 52, opted for a stylish monochrome look.
Penny opted for a cherry red blouse, which she teame with a pair of tailored trousers, while styling her blonde locks in a bouncy blow out.
Meanwhile, never one to shy away from attention, Rod cut a striking figure in a red tartan suit with a matching tie.
Also taking part in the charitable occassion was Gillian Anderson and Frank Lampard.