'How to Train Your Dragon' tops US box office

Neither Pixar nor zombies were enough to topple "How to Train Your Dragon" from the No. 1 slot at North American box offices over the weekend. The Universal Pictures live-action remake remained the top film, bringing in $37 million in ticket sales in its second weekend, despite the sizeable new releases of "Elio" and "28 Years Later.", according to studio estimates Sunday.

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"How To Train Your Dragon" has rapidly amassed $358.2 million worldwide.

Six years after its last entry, the Dean DeBlois-directed "How To Train Your Dragon" has proven a potent revival of the DreamWorks Animation franchise. A sequel is already in the works for the $150 million production, which remakes the 2010 animated tale about a Viking boy and his dragon.

Pixar's "Elio" had a particularly tough weekend. The Walt Disney Co. animation studio has often launched some of its biggest titles in June, including "Cars," "WALL-E" and "Toy Story 4." But "Elio," a science fiction adventure about a boy who dreams of meeting aliens, notched a modest $21 million, the lowest opening ever for Pixar.

"This is a weak opening for a new Pixar movie," said David A. Gross, who runs the movie consulting firm FranchiseRe. "These would be solid numbers for another original animation film, but this is Pixar, and by Pixar's remarkable standard, the opening is well below average."