Tarzan and BFG dwarfed by Dory at the US box office

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The Legend Of Tarzan and The BFG were no match for Finding Dory at US cinemas over the July 4th weekend.

The Pixar sequel - featuring the voice of Ellen DeGeneres as the forgetful blue fish - led the box office for the third straight weekend.

According to studio estimates on Sunday, Finding Dory earned $41.9 million (£31.5 million) in North America. Disney is forecasting a four-day holiday haul of about $50 million (£37.7 million).

Of the three debuts, Tarzan came the closest to dethroning Dory with $38.1 million (£28.7 million).

The horror sequel The Purge: Election Year opened solidly with $30.9 million (£23.2 million), in line with previous Purge installments.

The continued success of Dory bit into the opening of Steven Spielberg's Roald Dahl adaption, The BFG.

The movie had a disappointing opening, taking just $19.6 million (£14.7 million).