Warner Bros has a hit on its hands in North America with Cats And Dogs which grossed a meaty $9m on its opening day Wednesday. The family adventure, featuring digitally animated cats and dogs and the voices of Alec Baldwin and Susan Sarandon among others, led the field on the Fourth of July holiday and could be the top movie of the weekend.

However, Dimension Films' R-rated comedy sequel Scary Movie 2 also opened with a massive $8.75m on Wednesday and could still prove the victor of the weekend.

Warner's AI Artificial Intelligence took $5.16m on the holiday bringing its total to $42.65m after six days.