Transformers is shaping up to be this year's definitive summer blockbuster after achieving the highest seven-day showing for a non-sequel in US box office history.

The Michael Mann movie took $67.6 million (£33.7 million) in its first weekend and amassed over $150 million (£75 million) when the film's previews were included in its takings.

It has therefore broken the original non-sequel record set by Spider-Man in 2002 and made some headway in tackling this year's slightly sluggish box office.

Transformers depicts the battle between two races of robots which can adopt an array of shapes and weapons.

It is based on the hit toy line and cartoon series which was hugely successful in the 1980s.

After Transformers' impressive first week, animated comedy Ratatouille dropped down a place after fending off competition from the latest instalment of Die Hard, which peaked at number two and slipped to third place.

Both films have now hung in the box office top five after two weeks on the chart, continuing to take decent takings.

Michael Moore's latest documentary, Sicko, also stayed in the top ten along with Evan Almighty, the sequel to Bruce Almighty.

The third Pirates Of The Caribbean film also entered new ground this week by becoming the third film of the year to take more than $300 million (£150 million).

Spider-man 3 and Shrek the Third were the other two blockbusters to achieve this feat.

09/07/2007 11:13:32