All Of Me hitmaker John Legend and his model wife Chrissy Teigen have announced a partnership with McDonald's, launching a social media campaign to support the fast food chain's Ronald McDonald House Charities.

Teigen took to Instagram to announce the collaboration, posting a picture of the couple making the 'RMHC heart' with their hands, captioned 'John and I are SO HAPPY to be partnering with @mcdonaldscorp to show Ronald McDonald House Charities our hearts are with them this year. Pleaaaaase join us! When you post the @rmhc heart with the hashtag #HereForRMHC, McDonald’s will give **$100** in your name as part of a $100 million commitment'.