The Higher star set off her sporty outfit with a pair of flat white trainers, with her long bob wore in a straight style.
The blonde beauty joined in on the action in Italy following the Cash & Rocket launch gala in London last Thursday night and a fun-filled bash in France on Sunday at castle-set resort Chateau de Pizay.
Cash & Rocket, a fundraising initiative that has been running since 2011, features 70 women being sponsored by major fashion and luxury brands to drive across Europe.
This year’s route, which is raising money for three African charities, began on Friday in London and ended in Cannes on Monday night.
During the five-day spree, the drivers – who also include Topshop heiress and rock diva Jo Wood – passed through some of Europe’s most glamorous settings, including Paris, Lyon and Milan.
The challenge is right up Mollie’s street since she recently opened up about her competitive side during an interview with MailOnline.
‘I would only want to do a reality show where you learn a skill, rather than sit around talking’, she said.
‘I’m very competitive. I went on The Cube last year and I loved that.’