Fast-food workers frustrated by low wages are mounting an organized walkout next week in more than 150 cities across the globe.

The movement began in the United States where employees from fast-food chains McDonald's, KFC, and Burger King plan to march in 150 US cities, but has now gone global with workers in 33 countries planning to join the protest.

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Global locations where protests are expected to take place include: London, Sao Paolo, Dublin, Bangkok, and Buenos Aires.

The strikers announced the event on Wednesday outside a McDonald's branch in New York and targeted the fast-food giant as one of the companies that should raise employee wages and respect workers' rights around the world.

The upcoming protest will be backed by the International Union of Food, Agricultural, Hotel, Restaurant, Catering, Tobacco and Allied Workers' Associations, a federation composed of 396 trade unions in 126 countries which represent around 12 million workers.

The average pay for fast-food workers in the US is currently at US$9 an hour. The workers are demanding a raise in standard wages to $15 an hour.

This is the largest-ever walkout to target fast-food restaurants over low wages.

In 2012 hundreds of workers walked out of fast-food chains in New York demanding higher pay and better working conditions. However, protesters were unable to negotiate a standard wage of $15 an hour and the strikes were viewed as largely unsuccessful. 

As to whether or not next week's planned global strike will affect the operations of international fast-food giants like McDonald's remains to be seen, as the fast-food company claims that more than 80% of its restaurants worldwide are independently owned and operated by small business owners.