How to Train Your Dragon" is maintaining its top ranking in movie theaters. The Universal Pictures live-action remake maintained its No. 1 spot at the North American box office despite two sizeable new releases this weekend.

Universal's live-action How to Train Your Dragon will have no trouble staying No. 1 in its second weekend with an estimated $35.7 million despite the entry of zombie sequel 28 Years Later and the animated Elio - which is headed for the lowest opening in the history of Pixar amid a crowded marketplace for family fare.

Hollywood's struggles with original animation continue as Disney's latest offering opens below the $29 million for the R-rated "28 Years Later"