The new Melania Trump documentary beat box office predictions to earn more than $7m (£5.1m) at US cinemas in its opening weekend.

The film follows the US First Lady, and reportedly became the most expensive documentary ever when Amazon spent $40m (£29m) on the rights and a further $35m (£25.5m) on marketing.

It was expected to generate in the region of $5m (£3.7m) in its first weekend, but its actual takings are "a huge start for a documentary", Variety said, and "no one saw that coming", according to the Hollywood Reporter.

But it will need to earn much more to break even, with some suggesting Amazon's deal has more to do with politics than immediate financial considerations.

Melania: 20 Days to History promises viewers an intimate glimpse into the First Lady's life in the days leading up to her husband's January 2025 inauguration. Melania herself is among the film's producers.