Fast food lovers can win free food from McDonald's for the next 50 years.

Beginning on Monday, every time an order is placed for at least $1 on the McDonald's app, people are automatically entered in a nationwide contest.

Three winners will then be chosen to get a McGold Card, which allows them to get two free meals a week every week for half a century.

The promotion runs until Christmas Day, and there is a limit of one entry per day.