McDonald’s is offering customers the chance to get their hands on the 24-carat gold card, which will get the lucky winner free food for the next 50 years.

The card comes in the form of a phone case, which will be engraved with the winner's name so they can show it off to all their pals.

If years of free food and a very snazzy accessory doesn't appeal, the winner will be able to opt for a cash prize instead, too.

The competition is being run through the McDonald's app, and all people need to do is sign up and order a meal on it before August 24, reports the Evening Standard.

Customers will be able to email once a day to improve their chances.

However, the competition is only open to people who live in the US, and entrants must be over 13 years old.

A spokesman for McDonald's said, “The card give away is exclusive to the McDonald's App, which allows customers to customise their orders, get exclusive App deals and place their order ahead of time from their phones.”