Act II is a brand of microwavable popcorn, produced by Conagra Brands.
Act II was preceded in the popcorn market by Act I, an early microwave popcorn that had to be stored in the refrigerator. Act I was introduced in 1981.
In 1984, Act II, a shelf stable microwave popcorn was released, becoming the first mass-marketed microwave popcorn
According to Conagra Brands, Act II is the best selling popcorn brand worldwide (2014).