NEW YORK – The love-struck zombies of "Warm Bodies" swarmed the box office on Super Bowl weekend with a $20 million opening.

On a weekend that Hollywood largely punts to football, the PG-13 film from Lionsgate's Summit Entertainment easily led the box office, according to studio estimates Sunday. The Super Bowl always means a significant slide in movie-going on Sunday – studios predict a decrease of as much as 70 percent from Saturday to Sunday – but "Warm Bodies" still lured many teenage fans.

The film is about a zombie whose love for a human redeems him. Lionsgate, which also released the "Twilight" saga, is calling it a "rom-zom-com" for its mix of humor, romance and the supernatural. The film appealed particularly to females, who made up 60 percent of the audience.