Burger King has been accused of misleading customers by making its food look bigger in adverts compared to what it serves in real life.
The federal lawsuit, filed by South Florida lawyer Anthony Russo, alleges the fast food chain started inflating the sizes of its burgers in pictures back in 2017 and, as a result, has misled customers.
Before that, the suit claims the company "more fairly" advertised its food products.
Today, the size of virtually every food item advertised by Burger King is "materially overstated," it claims.
The advert for Burger King's trademark Whopper has been singled out specifically, with Mr Russo claiming the entire burger is 35% larger than the real life version.
Multiple YouTube creators and Twitter users who specialise in food reviews and have complained about their orders have been cited in the lawsuit as well.
Mr Russo and his claimants are seeking monetary damages and a court order requiring Burger King to end, what they claim, are "deceptive practices".
This isn't the first time Burger King has been accused of increasing the size of its food in its adverts.
In 2012, the UK's Advertising Standards Authority cited the company for serving burgers that had "considerably less" height and thickness than those advertised.
Burger King has been contacted by Sky News for comment.