The Secret Life Of Pets has become the latest successful animal movie this year, opening to a massive £103.2 million (£79.7 million) in the US.
The movie - featuring the voices of Eric Stonestreet, Kevin Hart, Steve Coogan, Louis CK and Ellie Kemper - follows the success of Zootopia and Finding Dory.
The Illumination Entertainment and Universal Pictures film cost only $75 million (£57.9 million) to produce.
Pets unseated Finding Dory from its three-week run in first place.
The film about the little blue fish actually fell to third place with $20.4 million (£15.7 million), behind The Legend Of Tarzan, which took in $20.6 million (£15.9 million).
The raunchy comedy Mike And Dave Need Wedding Dates also surpassed expectations with an estimated $16.6 million (£12.8 million) for a fourth place debut.