Amy, which charts the success and demise of the late Back to Black singer, first premiered at the Cannes Film Festival in France to rave reviews and was given a limited cinema release in the U.K. on Friday (03Jul15).

It racked up ticket sales of more than $800,000 (£500,000), making it the most successful opening weekend for a British documentary in the U.K. of all time. It all becomes the second-biggest debut of all documentary releases in the country after Michael Moore's 2004 film Fahrenheit 9/11.

Hamish Moseley from distribution company Altitude says, "We are thrilled that audiences have come out en masse during a period of exceptionally fine weather to see Amy... It is testament to not only an incredible film, from some of the U.K's leading filmmakers, but also to the unique talent and enormous lasting appeal of Amy Winehouse - we are delighted that audiences have chosen to celebrate the life of the truly talented musical icon."

The documentary will now be shown in more cinemas around the U.K. and is set for nationwide release in the U.S. on Friday (10Jul15).