Two Circles, an international agency based in London, New York and Bern, has committed to raising more than $1million (£800,000/€890,000) over the course of the partnership. 

This will be invested in Special Olympics GB grassroots inclusive programming and sporting events. 

"To have been chosen as Two Circles’ charity partner against stiff competition is a dream come true for our organisation," said Michelle Carney, Special Olympics GB chief executive. 

"This will be, without doubt, a game-changing partnership for not only Special Olympics GB but more importantly for our athletes and future athletes. 

"The knowledge, expertise and experience Two Circles will bring to our organisation cannot be underestimated and it will undoubtedly help raise long overdue recognition of our athletes and organisation in Great Britain. 

"We are very grateful to everyone at Two Circles for this opportunity, and we look forward to working together to help transform the lives of more people with intellectual disabilities."

Two Circles will also work with Special Olympics GB to create, implement and execute commercial strategies that result in new sponsorship deals, greater fundraising revenue and stronger digital engagement.

It is set to help Special Olympics GB influence diversity and inclusion agendas within businesses and support the organisation’s ambition to successfully bid to host the Special Olympics World Games. 

The agency will also look to support Special Olympics programmes across North America, Europe and other key international markets, with Two Circle staff volunteering at Special Olympic events. 

"Using sport to make a positive difference in the world is something everyone at Two Circles is hugely passionate about – so coupled with our proven approach to growing commercial revenues for not-for-profits, this partnership makes so much sense for us," Two Circles chief executive Gareth Balch said.

"Special Olympics were selected in a company-wide vote and we were all hugely inspired by Special Olympics’ commitment to promoting inclusion, equality and acceptance. 

"We’re proud to be giving back in this way, especially during these uncertain times for societies across the world, and can’t wait to see Special Olympics benefit from our work."