The Watchmen star was booked to promote her new horror/comedy The Final Girls at the annual fan event, but she revealed she wasn't feeling her best.

Malin took to on Thursday afternoon and shared a photo of her new 'diet', which consisted of plain crackers and water. "Breakfast, lunch and dinner," she wrote in the caption. "Doing NY comic con with food poisoning sucks!"

The 2015 New York Comic Con, which runs until Sunday (11Oct15), will also feature appearances from Eliza Dushku, Sean Bean, and Elementary stars Jonny Lee Miller and Lucy Liu.