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.

1. “Warm Bodies,” $20 million.

2. “Hansel and Gretel: Witch Hunters,” $9.2 million, ($15 million international).

3. “Silver Linings Playbook,” $8.1 million, ($7.8 million international).

4. “Mama,” $6.7 million, ($2.4 million international).

5. “Zero Dark Thirty,” $5.3 million, ($3.7 million international).

6. “Bullet to the Head,” $4.5 million, ($1.1 million international).