The film, which features the voices of Amy Poehler and Bill Hader and follows a collection of characters who live inside the head of a young girl, took $11.8 million (£7.4 million) in its opening weekend (24-26Jul15).

Ant-Man fell from the top spot in its second week, with ticket sales of $4 million (£2.5 million), and Minions dropped one place to third, with $3.6 million (£2.3 million).

Jake Gyllenhaal's boxing movie Southpaw landed in fourth, with $2.7 million (£1.7 million), and dinosaur sequel Jurassic World rounded out the top five, with $1.6 million (£1 million).