The actress, 33, talked about having to pack on a few pounds for her role in Fargo while on the red carpet at the Golden Globes.
"Literally I just gained weight," she told E! News.
Check out PEOPLE's full Golden Globes 2016 coverage!
So what did she eat exactly?
"Bread and cheese," she revealed. "Different assortments."
Dunst is nominated for best actress in a limited series for her role as a small-town beautician on Fargo. The FX show is also up for best TV limited series/motion picture.
But Dunst certainly didn't let a little weight gain hold her back when it came to choosing a dress for the award ceremony. The actress stunned in a long black, velvet gown. The dress showed off her trim waist with several ties and featured a plunging neckline.
The 73rd annual Golden Globes, hosted by Ricky Gervais, are being presented live from Beverly Hilton Hotel in Beverly Hills, California, on NBC.